If your PC is having problems it may be because it's dirty and buggy. And we mean really buggy.

Insects such as cockroaches and spiders pose a real threat to PCs according to a new survey of over 1,300 computer repair professionals in the US.

Keep in mind that the study was conducted by the manufacturers of Dust-Off compressed-gas cleaner, which has a strong interest in you keeping your computer clean with its products. Even so, the survey threw up some scary findings, linking 72 percent of processor failures to poor PC maintenance.

Besides creepy crawlies, other nasties technicians found lurking within the innocuous beige boxes include: reserves of marijuana and cash; loose screws and nuts; and "many generations" of mice, from babies to rodent skeletons — ewww.

What's more, bad personal computer hygiene was linked to 70 percent of keyboard failures and 85 percent of breakdowns in printers and mouse devices.

Hmm… perhaps we will keep the case on our PC, we are a bit scared of what we might find inside.