I always have because, well... Steve Vai does it! And now I'm not so sure. I think it cuts down on spring squeak, but is it killing energy transfer to the body and thus sustain?
I'm setting up my RG7620 and am going to leave the wadded up Kleenex out of the cavity for now and see, but I was wondering what you guys think.
I did put rubber tubes over the springs until I realized how tedious and boring it was. Also I no longer care if there is extra little noises.