Joined: Jan 2010
Posts: 9,778
Likes: 1,746
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Age and storage conditions, mostly irreversible, sorry for the bad news. I've used heat with some success when the adhesion became a problem.
Possibly though it's a QC issue with the product.