I make sure I do not touch anything inside the box..It is easy to take a good vaccum such as Rigid makes and pull the problem dust thru the fan outlet and the inlets in the case..I also use the plastic hose is all when inside and prefer to use a small brush to knock the dust loose as the vaccum sucks it clean...But I know it sure is good to have her running at top speed again...By the way, if you need a shop vac get the Rigid...I bought 2 at Home Depot and the warranty is, as long as you own it and take it to the store and they plug it up and flip the switch and it will not come on they give you a new one....Now that is a life time warranty..Oh and lively, your suppose to eat the spam...