Use any type of mouthwash you like. Place small amount in your mouth. Put in call and swish. Take out and place spacer cut from coated paper clips (I'll explain how to do this if anyone requests it) between each of the reeds of the call. Place in call box and place in the fridge until ready to take out (from one season to the next or from one hunt to the next). When you take it out for use repeat the mouthwash swish again and the spacers will easily come loose. About the same result, with a lot less cost
"Chasin' gobblers has a lot in common with dealing with a wife, 'bout the time ya' think ya' got 'em figured out, they change the rules!!!"