Foam blew the airlock and plug out of my better bottle. I don't know how long it had been open. I'm in a situation where I can't go get a blow off tube. So I put several drops of foam control in there and refilled and replaced the airlock but foam has entered the airlock 3 times since. Is there a danger of infection or off flavors because of the lack of pressure? What can I expect to be screwed up, if anything? I'm sure anything is possible but it seems if foam is coming out nothing bad can get it until it stops.