loose screws
Loctite #222 is the best choice for grip screws, it's a low strength, non-permenant bond designed for small fasteners. Unfortunately, it's not very common. #242 is very common and will work in a pinch, but it may fight you when it comes time to remove the screws. A trick I learned a long time ago for small screws is to dip the threads in Boiled Linseed oil. It turns to gum, will not be permenant, and can be cleaned off with normal solvents.