Answers:

How to clean the boiler scale of steam sterilizer?

Mix 100 ml of Vinegar with 100 ml of Purified Water (or use 200 ml of Purified Water and 10 g of Citric Acid) and pour into the Sterilizer and let it soak for 30 Minutes. After soaking for 30 Minutes turn on the power for ONLY Ten Minutes to warm up the solution then turn off. Let it soak for an additional Ten to Fifteen Minutes and pour out, Rinse completely with fresh water. If Boiler Scale Build-up still exists, repeat the Cleaning Process.