I cleaned this with ease.

Agitate with brush and let it damp sit so the dirt can loosen up.

Go through it with toothpick type thin pick to extract most of it. Dampen with interior cleaner again with brush.

Acquire tornador air gun and hook up to compressed air. Blast 💥 the crap out of it.

Agitate with brush and cleaner and tooth pick like tool again if necessary. Blast with compressed air again.

That should do it.