First off, never use anything that has in it's title "miricle", "Magic", "No Strain","Best Ever", "Wonder" this or that.
Next go with the zoope seal. It isn't cheap (best price I've seen 109. 00), but if you want something that works, this is the stuff.
If your mouth is bigger then your wallet, then get a bag of rags and a tube of Wennole.