Give your beer a proper beheading. No, not that kind. For homebrewers who want to eliminate the frothy head atop their fermenting beer, MoreBeer! has a beer foam control product called FermCapS to wipe out unwanted foam during fermenting and help you brew more beer in the fermenter you already have. FermCapS will not affect the head retention on your finished beer, just the beer during its fermentation stage. One ounce of FermCapS foam control should provide you with enough for 50 batches of home brewed, fermenting beer. Just add in two drops of FermCapS at the start of fermentation. It should eliminate those aggressive krausen concerns that can make the blow-off tube a mess otherwise.