My photo PC is in the "shed", it's brick and quite secure, not from flies that is. Working on an image last week with the door open a few small fruit fly types crawled across the monitor, I just brushed them off, as you do and plodded on. Next day same thing, one fly was persistent and would not brush off so I stabbed at it gently with a finger, and there it stayed, smack in the middle of the screen, dead; problem is it's on the underside of the screen and stares at me every time I switch on. bugger...