It's been almost a year i got my first PC and it's cooling performance have been degrading with time, and i think it's because i didn't clean my radiator thoroughly (I always use a paint brush to clean it and blow it with my mouth), and i'm way too much of a newbie in PC hardware maintenance to clean the radiator with water and i don't have those water-shooty-thingies. In other words, i'm too afraid to involve water into the equation. So is it fine if i use vacuum cleaner to clean my radiator? Although, i've heard that vacuum builds up static electricity and could potentially fry my PC.