Then you have too much stuff in it... If you didn't pull it out and use it while leveling THIS time, then why are you keeping it?
Okay, okay.. I suppose you could be going for completionist and TRing into all different classes, but only one type is your "main" class... If your main is a melee, then keep some random-gen caster gear on a mule... no need to hold onto a lot of named bound gear in your TR cache for the few times you'll be a running a caster.
Or you've got 20-28 gear in there... that's legitimate... but that should just be a few named items.
I'm betting most of you with this problem have named items that you haven't used in 2-3 years, but you can't bear to throw away. I had that problem... but finally threw all that old junk away and life is better..