Cleaners... check the saftey papers, usually they are just a mix of acetone, mek, toulene, xylene, etc.. but they may have conditioners in them.
After cleaning, wash with soap & water to remove chemical traces & they will last longer.
No issues typing? I'm beginning to see a pattern. If others are composing in a thread simultaneously; it wrecks my post, or I get dropped and loose all text.