Food Safety Center Guide
Cleaning Food-Contact Surfaces
Food-contact surfaces are everything that touches food on its way into the machine: trays, utensils, knives, cutting boards, containers, mixing tools and grinders. The workflow is the same in every case: remove food debris, wash, rinse if required, sanitize appropriately, then air-dry or fully dry before use.
See it visually: door gasket statesThe Core Food-Safety Principle
Freeze drying is not a sterilization step. If food is unsafe before freeze drying, freeze drying should not be expected to make it safe.
Freeze drying removes water; it does not reliably eliminate bacteria, viruses, molds, spores, or toxins. Low moisture can inhibit microbial growth during proper storage, but preventing growth is not the same as destroying microorganisms.
The Five-Step Workflow
- Remove food debris Scrape or wipe away visible food, grease and residue so the wash step can reach the surface.
- Wash Wash with warm water and an appropriate detergent or cleaning product for the material, following any manufacturer guidance for the item.
- Rinse if required Rinse away the detergent where the product and material require it, so no cleaning residue is left behind.
- Sanitize appropriately When your routine calls for sanitizing, use an appropriate method or product and follow the sanitizer manufacturer's labeled directions. Do not invent concentrations or contact times.
- Air-dry or fully dry Let items air-dry or dry them fully before use or storage. Wet surfaces and damp containers are not the clean starting state you want for dry food.
Material Matters
Follow material and manufacturer guidance for every item: stainless steel trays, plastic boards, silicone mats, rubber gaskets and glass containers all have different care rules, and harsh or unapproved treatments on the wrong material can damage surfaces in ways that make them harder to clean later.
Between Uses
A few habits keep food-contact surfaces honest between batches:
- Wash and dry trays before each new batch, even if they look clean.
- Wash cutting boards and knives between different food types, especially raw and cooked.
- Keep scoops, funnels and containers clean and stored somewhere dry and protected.
- Inspect surfaces for scratches, cracks or damage that can trap food and resist cleaning.
Sanitizing: The Honest Rule
Follow the Sanitizer Label
When you use a chemical sanitizer, follow the sanitizer manufacturer's labeled directions for concentration, contact time and any required rinse. This site does not publish sanitizer concentrations because they are product-specific.
Frequently Asked Questions
Do I need to sanitize trays between every batch?
Clean trays before every batch and sanitize them appropriately as part of your routine. If you use a chemical sanitizer, follow the product's labeled directions.
Can I put my freeze-dryer trays in the dishwasher?
Check your trays' material and the guidance for your machine. Some trays tolerate dishwashers; others can warp or damage. Follow the manufacturer's instructions for your trays and machine.
Key Takeaways
- Clean every food-contact surface: trays, utensils, knives, boards, containers, tools.
- Follow the five steps: debris, wash, rinse, sanitize, dry.
- Follow material and manufacturer guidance for each item.
- When sanitizing with a chemical product, follow its labeled directions.
Related Guides
Continue through the Food Safety Center with these related guides.