The Smile Direct Club smile spa is the first cleaner to combine powerful cleaning elements. It thoroughly cleans all sorts of mouth gadgets – clear aligners, retainers, sport mouth-guards, night-guards, bruxism appliances, TMJ appliances, dentures, water flosser tips, and even toothbrush heads. Fully cleans within two 5-minute cleaning cycles. The durable, stainless steel reservoir is large enough to clean multiple items at once. Just add water. Or combine with one of our universal cleaning tablets for a minty-fresh clean.