No formal qualifications needed. Germs can live on refrigerator handles for at least two days apply a small amount of dishwashing soap to a damp microfiber cloth to wipe away bacteria avoid using bleach or other harsh cleaners to prevent chemicals from getting in your food. Gas pressure check to ensure the boiler is operating at the correct gas pressure. Using a secure mobile card terminal. Your property has mains gas you have no asbestos in your property. Reliable.