Sticky button on 901 Riva Manual Battery?

[lucindamartinez]

One of the bats that I have for my 901 Riva seems to be sticking a bit. It is harder to press and release than the others that I own. It is functioning, I was just wondering if there is a safe way to clean this to help it to be more easily depressed?

 

[Gulliverfoyle]

I had this problem with some Ego batts. I cleaned up around the button hole, carefully, with a needle file. It helped a little but they should break in after some use. If it's really bad send it back.