No Stress Professional, for businesses. For home use: nostressclean.com →

For coffee machine & vending service companies

Descale boilers in 30 minutes. Gentle on seals.

Professional descaler, biofilm remover and degreaser for service technicians.

Coffee vending machine: the boiler and heating elements inside need regular descaling with a professional descaler
Tested No Stone Professional on N&W heating elements Vending machine heating sets, 30 min soak. Seals, plastics and contacts undamaged in this test.
2 of 2scaled heating sets back in service, including 1 already written off
~30 minsoak, no brushing or mechanical cleaning
0damaged seals, plastics or contacts in the protocol
Next visitNo Foul kept drip trays and buckets clean until the scheduled service (Kavomat)

What we see in practice

4 problems in coffee machine service, and what solves each one

Technicians name water and scale among the main reasons for service calls. Each replaced boiler and each second trip comes out of a fixed-price contract.

Technician taking apart a fitting covered in heavy limescale
Scaled parts usually go to the bin, not back into service.
Problem 1 · Scale

Scaled boilers and heating elements get replaced

Scale is a common reason boilers and heating elements get replaced. Once a heating set is heavily scaled, strong acid would risk the seals and contacts, so the part goes in the bin and a new one is ordered.

Solved with No Stone Professional
Problem 2 · Descaling damage

The descaler damages the machine

Gaskets and o-rings attacked, aluminium boilers pitted, a machine out of service after a descale. Some makers now tell owners not to descale at all.

Solved with No Stone Professional, not a mineral acid
Problem 3 · Mould and biofilm

Mould, slime and smell between visits

Drip trays, water tanks, waste buckets and drains stay wet. Biofilm and mould grow back before the next scheduled visit, the customer complains, and a technician drives out again.

Solved with No Foul, not a disinfectant
Problem 4 · Coffee oils and grease

Greasy buttons, panels and grinder area

Coffee oils and milk residue build up on the outside of the machine. Strong alkaline cleaners take the dirt off, and sometimes the button paint with it.

Solved with No Grease

Before and after

Same object, before and after

Limescale remover result: tap covered in limescale before, and the same tap clean after No Stone BeforeAfter

No Stone: limescale on chrome fittings

Scale removed from chrome fittings, no visible surface damage when used as instructed.
Commercial kitchen degreaser result: stainless steel hood with burnt grease before, and clean after No Grease BeforeAfter

No Grease: burnt grease on stainless steel

Commercial kitchen hood, grease and oil film removed from stainless steel.
Limescale and rust stain remover result: bathtub drain area with brown mineral stains before, and clean after No Stone BeforeAfter

No Stone: mineral and rust stains in a bathtub

Real customer photo. Brown mineral deposits around the drain removed with No Stone.

The line

Professional descaler, biofilm remover and degreaser for service technicians

Concentrates in 5 l canisters. 1 set of chemistry a new technician can use on day 1.

Not classified as hazardous (SDS 2.1)No special PPE in normal use (SDS 8.2)Not ADR dangerous goods (SDS 14)SDS and data sheets

No Stress professional cleaning products: No Stone, No Stone Professional descaler, No Foul biofilm remover and No Grease degreaser
NO STONE PROCommercial descaler

Boiler and heating element descaler

Professional descaler for coffee machine boilers and heating elements, and an industrial limescale remover for fittings and sanitary parts. Does not damage plastics, silicone, rubber seals, glass or labels in normal use and short contact, up to 30 minutes.

  • Not a mineral acid and not phosphoric acid based
  • Deactivates itself as it works: end point visible by pH, no neutralisation step
  • Corrosion comparable to citric acid in internal measurement

Limits: soak 30 min at most. Not for zinc or galvanised parts. Long soaks on already damaged stainless steel can discolour it.

Technical data sheet (PDF)
NO FOULBiofilm remover

Biofilm, mould and odour control

Helps prevent biofilm and mould in drip trays, water tanks, waste buckets and drains. A thin layer after the regular clean holds back slime and smell until the next scheduled visit.

  • Works at very low doses, about 4 sprays per waste bucket
  • Removed coffee oils, milk and organic residue in the Kavomat test
  • No hand irritation reported by staff

Not a disinfectant. It controls biofilm and smell and does not replace your sanitising step. It does not remove scale or milk stone.

Technical data sheet (PDF)
NO GREASEIndustrial degreaser

Commercial degreaser

Degreaser for machine exteriors, buttons, grinder housings and stainless steel, with cleaning power comparable to classic alkaline degreasers.

  • Used in concentrate on machine buttons without damaging the paint (field user, Ljubljana)
  • No visible damage on stainless steel
  • Fully water-soluble, works at low concentrations

Also used in professional kitchens on fryers, hoods and natural stone.

Technical data sheet (PDF)

Field results

Tested on working machines, not in a lab

2 protocols from service work in Slovenia.

Request test protocol
No Foul · Kavomat servis Ljubljana · signed protocol, October 2026
"The treated condition was maintained until the next scheduled service visit."
  • Slimy organic deposits rinsed out of drip trays and buckets
  • After about 4 sprays into the waste bucket, staff no longer noticed the smell
  • No visible surface damage, no hand irritation reported
No Stone Professional · heating elements protocol with photos
The scaled element "was replaced with a new element, as cleaning was no longer considered a sensible option." It came back clean after a 30 min soak.
  • 2 heavily scaled N&W Valbrembo heating sets, no mechanical cleaning
  • Scale, mineral deposits and most oxidation removed
  • Brass, plastics, silicone, rubber seals and contacts undamaged; serial numbers legible

Free guide

The descaler that should protect the machine is wearing it out

Technicians and owners report gaskets and o-rings attacked by acid descalers, aluminium boilers pitted, and makers now advising soft water instead of descaling. The guide collects what people in the trade say and what changes when the descaler leaves seals and plastics alone.

Read the guide

Downloads

Technical data sheets and safety data sheets

PDF files for your technicians, purchasing and safety officer. English, with the Slovenian SDS originals.

Open downloads

Questions from service teams

FAQ

Does a non-hazardous descaler really work on heavy scale?

In the heating elements protocol, 2 heavily scaled sets were descaled in about 30 minutes without brushing, including 1 that the service company had already replaced. The free test lets you check it on your own parts before you buy.

Is No Foul a disinfectant?

No. No Foul holds back biofilm, slime and smell between visits. Keep your existing sanitising step where a disinfectant is required.

Which materials should No Stone Pro not touch?

Zinc and galvanised surfaces react fast, so keep them out of the bath. Do not soak longer than 30 minutes, and avoid long soaks on stainless steel that is already damaged.

We are tied to our machine maker's chemistry. Can we still test?

Many teams start where the contract chemistry does not reach: No Foul for drip trays, waste buckets and drains after the regular clean.

Can we use No Stone Professional as a boiler descaler on commercial coffee machines?

Yes. It was made for coffee machine boilers and heating elements and tested on N&W heating sets and on machines of a coffee machine service company in Ljubljana. Soak no longer than 30 minutes and check the end point with a pH strip.

Do you offer private label and white label cleaning products?

Yes. We manufacture the line in Slovenia and supply it under our brand or yours, for service companies and cleaning chemicals distributors. Ask for minimum batch and label terms.

Where can I download the safety data sheets?

On the Downloads page: technical data sheets and safety data sheets in English, plus the Slovenian originals.

How does the free test work, and what happens after it?

You tell us about your fleet, we send No Stone Professional and No Foul with dosing instructions, and your technicians use them on scheduled visits and on scaled parts in the workshop. If you continue, we keep safety stock at your site and invoice only what you used, at 20% off the base price. Volume prices from 20 canisters, private label available.

Which countries do you deliver to?

Across the EU from Slovenia. Tests start first in Slovenia, Croatia, Austria, Italy and Germany.

Free samples

Test No Stress on your own machines

  • Free samples, no obligation
  • Shipped to your workshop with dosing instructions
  • Your technicians run the test and judge the result
No Stress professional cleaning products, brush, gloves and microfibre towels