I've always dry-hopped in a carboy and plan to dry-hop my next brew in the keg. After reading about ways to do this, I've settled on putting pellet hops in a hop bag and tying it to the dip tube. My question is exactly "how" do you tie the bag to the dip tube? I assume you'd perform this step after sanitizing the keg. You'd then have to get one arm into the keg and use that hand to tie the bag around the dip tube (maybe using a zip tie). That seems difficult to do and clearly has the potential to add nasties into the keg. Perhaps I'm missing something but would appreciate folks walking me through the process they use to actually tie the hop bag. Thanks for the help.