I brush while wearing my pyjamas, I don't really care if they get slobber/foam stains.
It'd be great if a mouthwash that negates the need to brush could be invented, but it seems unlikely. Anything strong enough to dissolve the crud off your teeth would also probably dissolve the flesh inside your mouth at the same time.
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"If you stick a knife in my back 9 inches and pull it out 6 inches, there's no progress. If you pull it all the way out, that's not progress. The progress is healing the wound that the blow made... and they won't even admit the knife is there." Malcolm X
戦争ではなく戦争と戦う