What is the best type of disinfection for handpieces without causing them to freeze with use?

Handpieces must be sterilized after use, not just wiped down. The best product to use for handpiece maintenance is called QUATTROcare (Kavo Dental). This product cleans, lubricates, and purges all types of handpieces; slow-speed, high-speed, straight, air motors, etc. This product can be used immediately before sterilizing, and it lubricates up to four handpieces at once. I would highly recommend looking into this product to keep your handpieces healthy.