US Patent No. 8,642,017 B2; Orabrush, Inc., Provo, UT, has patented a method of applying a liquid cleaner to clean the surface of the tongue. It entails obtaining an oral cleaner comprising water, poloxamer 407 as a foaming agent, a sweetener, a flavoring agent, an antimicrobial agent, a preservative and a coloring agent. The oral cleaner is in liquid form prior to being dispensed from a container. It converts to a foam while being dispensed, and returns to a liquid when placed on the tongue.
The oral cleaner also contains a biologically-active enzyme for breaking down material contained within the grooves in the surface of the tongue. It is comprised of one or more enzymes selected from the group consisting of lysozyme, amylase, amylglucosidase, glucoxidase, serrapeptase, papain and lactoferrin.