While most towel warmers are also designed to sanitize, some models only come with a heating function. If what you need is a towel warmer that also sanitizes, make sure the model you choose mentions having a UV lamp. This optional feature can be found on towel warmers regardless of manufacturer and capacity and is operated via a different button than the power one. The sterilizer function will typically turn off on its own after 10 to 15 minutes and the UV light always turns off when you open the towel warmer cabinet door to prevent eye damage.