is the rubber tube attached to your peep sight??
if so dont worry about it. goto the shop and tell them you want a peep sight without that rubber tube
i never used one...but hear they are more trouble than they are worth. and if one snaps at full draw its got one place to go...your eye ball. that enough keeps me from using a peep with an alignment tube.
thats the only rubber tube i can think of on a bow...