You'll just need a screwdriver to easily remove the screw. No tricky techniques to it but just be careful that the screw won't accidentally fall off else you might lose it. After removing the screw, the filter cover should easily come off as well. The sponge media is the one that filters out the air. You can easily remove it to inspect if it needs cleaning by pulling it out of the filter cover by hand or using a pair of tweezers or clippers. This sponge media really does need some cleaning work. The dust accumulated hinders free passage of air into the compressor. Dust apparently accumulated on the air inlet part of the filter cover. After a quick dusting (you could also wash the sponge with water and dry it out), place the sponge media back into the filter cover. Screw it back and you're done. Pet Links to check-out: MAGS-Pets: www.fb.com/MAGSPets MP Instagram: www.instagram.com/mags_pets MP Twitter: www.twitter.com/magspets MP Blogg