As a noob I am trying to keep my attys clean (I wash them in really hot tap water and dry them over night every couple of days). Anything else I should be doing? How can I tell if they are toast? Any chance of "bringing them back from the dead?" I have a 510 if that makes any difference. Also, is there any way to disassemble it to really get to the atty - IE, remove the metal "sleeve" around it?