Most dudes never wash their hands after using the restroom, whether #1 or #2. I'm one of the few dudes that does wash hands each trip to the restroom. I don't go so far as to use the now wet paper towel to open the door though.
As for your LCD conundrum, I guess it depends on the LCD and the laptop. Some of them are a real PITA to disassemble. Keeping track of all of the different sized screws is very important, as well as not stripping the screws. I don't bother doing many laptop repairs. I just don't have the patience for them. So I bring them to my colleague and he does all that for me. I guess the question you should ask is "how important is your time?" and "do you want to learn a new skill?"
As for your LCD conundrum, I guess it depends on the LCD and the laptop. Some of them are a real PITA to disassemble. Keeping track of all of the different sized screws is very important, as well as not stripping the screws. I don't bother doing many laptop repairs. I just don't have the patience for them. So I bring them to my colleague and he does all that for me. I guess the question you should ask is "how important is your time?" and "do you want to learn a new skill?"