This post literally saved me from buying a new battery. The slider was virtually glued to the case and seized up, and I had to push the cart at an angle just to get it to work and I could not figure out how to get it clean. Now it’s clean fully functional again!

Having access to a computer repair toolkit helped make quick work with these instructions but honestly anyone could probably follow these with a small eye glass screwdriver (and some rubbing alcohol and towels) to do the job, with maybe some sturdy tooth picks for the crevices