You could try this too-
While you are at it how about cleaning the slots out -RAM ? You can do that by cutting a thin stripof an old credit card say 5 - 10mm wide - round the corners off wrap some nonfluffy microweave cloth (the glass cleaning variety) round the end of the cardstrip, moisten it very lightly with some alcohol and GENTLY wipe down the slotsto clean any dust or crud that has got "hardened" onto the slotcontacts. Do the same to the stick contacts only very gently.