Attempting to replace air filter and its turning into a nightmare. Finally found the housing and could release 2 on the clips but clip on bottom seems impossible to release. Any tricks to this. Worried if I get it released will never be able to reattach it. Does the cover hinge on the back or is their a clip there to. I seared for hours looking for a video on how to do this, can't find a thing. Any help would be appreciated.