Yeah they're useless. Compressed air and a paintbrush is the best way. Make sure your house is cleaned regularly and have fan filters on and the problem isn't as bad then either.
Get electric pumpor you can get a foot one and get a work out and clean your pc at the same time
![]()
Buy an air bed pump from that high street shop they work an absolute charm for pc's £20 for a semi decent one but the best thing you will ever buy.![]()
This is the one I use £22-99 it's superb for cleaning pc's don't be put off when used with those attachments it even blasts all the dust out of the fins of a tuniq tower, more than powerful enough and the best thing I have ever bought for cleaning pc.