There is a plastic washer under the springs that the springs set against---it can not be moved. Keep in mind, these sockets are wired into a finished vehicle. To try and add a fiber washer now, the wiring ( 2 wires to each socket) would have to be disconnected, a new fibre washer fabricated, and the wires routed thru them, then rewired.---and I paid over $100 for them lights!!!---I purchased them thru Hortons 2 years ago, and Hortons has since changed ownership (it wasn't Hortons fault anyways---he just sells Ron Francis stuff.) Denny, I guess I will have to buy new push-in sockets if I can't find a way of fixing what I have. This is just a case of a big name aftermarket Auto parts company selling really poor quality junk.