Your keyboard and mouse can get very dirty... in fact, it's the dirtiest part of your desk more than likely. Be careful though, don’t douse it in water or soap. Instead, use a highly damp cloth with light soap to gently clean your keyboard and mouse. Unplug it first if it's wired, turn it off, and remove the batteries if possible... just in case. Do the same for your monitor. There are spray cleaners you can buy for monitors and wipe with a clean dry rag. Keeping your computer away from heat is also important, and don’t pile papers or items on it either... it needs air and it has to breathe!
If you need to clean your Mac on the inside, give Macs on Demand a call - we can clean it up like new inside and out!