I have found the best item for cleaning around keys on the computer. A clean, sponge eyeshadow applicator. I always have extras of these (I use brushes instead).
I've noticed people mentioning grease from hands entering their remote control. No cleaning of remote controls, if you wrap remote in saran wrap. The wrapped remote works perfectly well. Replace the wrap when changing batteries.
I have an LCD television and my wife has used furniture polish on it to clean the screen. This has left a cloudy film on it which I have tried to remove but it hasn't worked!
I have a radio receiver which operates on dry cell batteries. The battery compartment consists of two tubes one houses 3 cells while the other one has one cell. Both tubes have springs on one end (which touch the -ve pole of cells).
I need to know how to go about cleaning DVD's and DVD/CD players. I am afraid dust or some kind of particles may have entered mine since it does't want to play. It is not very old.