Hey all. I bought a 2002 F150 from the original owner that lived on a farm. Needless to say, the inside of the truck was smothered with dirt from his property. Got most of everything cleaned up but the AC vents have a lot of natural dirt built up from him driving the truck around his property with the windows down 
Any tips on how to attack this would be greatly appreciated!
PS - I’ve tried q-tips and brushes but the dirt is caked pretty good..

Any tips on how to attack this would be greatly appreciated!
PS - I’ve tried q-tips and brushes but the dirt is caked pretty good..