Check to see if you don't have a broken Spider support bracket by lifting up on the Stainless Steel Tub and see if there is any play. There should be minimal play! You can also inspect the Plastic Outer Tub Shell for rubbing or splintering, that will be a dead give away your spider support bracket is failing or cracked and the tub has drooped hitting the outer plastic shell and door boot. LOOK VERY CAREFULLY. Let us know what you find. That's typical on these units with anywhere from 2 to 10 years on them.