Crud in the vent, how do I get it out?

I just had an epiphany....my valiant/dart are drivers. So what I just did is ordered two trunk plugs. I will cut a round hole and feed a shop vac in. Then I’ll plug it with the rubber trunk plug. I’ll post up once I get it done...I’ll do it to the valiant first to see proof of concept
You'll defeat the firewalls function.