1997 Golf

I’ve got a 1997 Golf Mk3, 1.8L, that has a bad PCV valve. I bought a new valve this weekend but am having trouble unhooking the old one from the 2 hoses attached to it (the one attached to the air filter duct and the one attached to the breather tube). I’ve twisted and pulled on the hoses but can’t get them to budge. Is there a secret/trick to disconnecting these hoses? I don’t want to break something, especially the brittle breather tube, so I’ve been leary to use more force than necessary.

Thanks for any help!
Mark