Vacuuming the inside. I have a Sharp hand held vacuum that I use for cleaning "inside" the machines. Once I put the crevice tool on, then I use duct tape to attach a drinking straw. Just make sure the duct tape leaves a bit of space so you don't get too much suction. I can slide that straw into just about any spot, even squeezing it a little to fit the tiny spots. By using a handheld vac, if I accidently suck up something important , there is only a small screen to clean to find it instead of going through a whole vacuum cleaner bag!