GLC Must Live On

I am sorry if there is a place I am overlooking on cleaning tapes, but I need advice. My Ms. Pac man won't work, how should I go about cleaning it? All my other games work except for this one.

I also have a question about a game. I am not even sure if it is an Atari game, sorry. You shoot "missiles" at eachother. You have to set the angle and the power.