Thanks for the replies.
Hitting a button several times a day is bound to wear it out, the paint is already coming off and I don't think it was made to be hit that often.
I have the power option set to 10 minutes but, whenever that time comes the monitor turns off for a brief moment but then comes back on automatically. Again, I've ensured that it's not a sensitive mouse...
I use an app called "keyman" to use a keyboard shortcut to turn the monitor off but the same thing happens. I should also note that the same issue occured with my last build after a while and also on my laptop... It's a more difficult issue for my laptop because I like to minimize the number of times I close the screen as this tends to lead to a wobbly screen after a while.