Sticking gas gauge remedy?

[Uwe Blab]

I have a stock, behind-the-seat gas tank. I'm having problems with the gas gauge sticking, usually registering full or near full. I've tried rocking the truck to break the float loose in the tank but that typically doesn't work. Filling the tank with gas won't dislodge it either. Any thoughts on something I could do to keep the float from sticking in the first place? My ideal is to mount an under bed tank, but that's a discussion for another post.

Thanks for any help.

Regards,
Adam