Commercial Dishwasher Cleaning & Maintenance: How to Do It Properly
The commercial dishwasher is the workhorse of your kitchen: hundreds of wash cycles per day, along with grease, starch, protein, and often hard water. Neglecting daily maintenance risks hygiene issues, dull glasses, lime scale damage to the heating element & in the worst case a breakdown in the middle of service. The good news: With a fixed routine of a few minutes per day, your machine will remain reliable over years and consistently deliver flawless wash results.
Why Daily Cleaning Is Crucial
Unlike in households, a commercial dishwasher operates with a tank whose water is used over many wash cycles. Food residues, grease and cleaning agent residues accumulate there during the day. If the tank is not emptied and cleaned daily, you will wash with contaminated water the next morning – jeopardizing hygiene and visibly worsening the result. Blocked filters and spray arms also cause the machine to use more detergent and energy without improving the wash quality.
The Daily Routine After Operation
Plan about ten minutes at the end of each wash day – in this order:
- Drain the machine: Completely drain the tank water (on many models via the self-cleaning programme) and switch off the machine.
- Remove and rinse filters: Take out flat filters and pump filter, rinse under running water, dispose of coarse residues in the waste – never tap them into the drain.
- Check spray arms: Remove upper and lower spray arms, check nozzles for blockages and flush through. Clogged nozzles are the most common cause of poor wash results.
- Wipe interior: Wipe tank, inside door and seals with clear water, remove any label or food residues.
- Leave door open: Keep the hood or door ajar overnight so the interior dries and no odours or germs develop.
Weekly Deep Clean
Once a week, get more thorough: Check rinse and detergent hoses for kinks and air bubbles, wipe down the casing and inspect seals for damage. Remove lime and starch deposits inside with a deep clean on an empty machine. Exterior stainless steel surfaces remain visually appealing longer with a suitable care product – you can find matching products in our cleaning agents for dishwashing technology category.
Descaling: When and How
Lime is the sneaky enemy of every dishwasher: it deposits on heating elements, prolonging heating times and driving electricity consumption up. White deposits in the tank or on washed items are a clear warning sign. For medium-hard water, descaling about every four to eight weeks is recommended; for hard water, more frequently – for example with Descaler F1L. Take dosage and exposure time from the label; then rinse thoroughly with clean water. In the long term, water softening before the machine is worthwhile for hard water.
Correct Detergent and Rinse Aid Dosage
More is better? The opposite applies to detergent use. Overdosed detergent causes foam, streaks and unnecessary costs; underdosing leads to greasy residues and hygiene risks. Follow manufacturer instructions – typically 2–4 ml detergent per litre of tank water depending on water hardness. The combination of Dishwasher Detergent F10L for powerful cleanliness and Rinse Aid F10L for quick, spot-free drying of glasses and cutlery has proven effective. Regularly check that dosing pumps draw properly and containers are replaced on time.
Common Mistakes
- Leaving tank water in the machine overnight – germs and odours are inevitable.
- Only rinsing filters but forgetting the pump filter.
- Ignoring clogged spray arm nozzles and instead increasing detergent dosage.
- Using household detergent in the commercial machine – heavy foaming can damage the pump.
- Postponing descaling until the heating element is already damaged.
- Not pre-clearing dishes: coarse food residues belong in the waste, not the machine.
Conclusion
Ten minutes of daily maintenance, a weekly deep clean and regular descaling – no more is needed to keep your commercial dishwasher working hygienically and economically for many years. The right dishwasher chemistry and correct dosing make the difference between dull glasses and sparkling results. Are you planning a new machine or looking for suitable detergent? In our dishwashers category, you will find commercial dishwashing technology for every requirement. For questions about dosing, water hardness or machine selection, we are happy to advise you personally at +49 6724 2069393.
Related Guides
Last updated on 2 September 2026.