So I bought my jeep new last year, and I put it in the mud totally naked, the first weekend I had it.. I know, "mud is bad" as told to me by one of my best friends. But anyways, I have gotten to where I like the interior clean now, and everything looks decent, except the speaker ports. I tried a toothbrush in there and it did not work. I really don't want to take it somewhere if I don't have to. Pictures for reference, ignore the tire-shine. It wasn't me.

 

Time and Q-tips.

 

I like to use a vacuum with a short brush attachment to mechanically agitate the dirt, break the bulk loose and suck it out of the fixture. Then use a soft detailing brush and dampen the bristles with interior detail spray of your choice and work the treated brush into the speaker vents to blacken, soften and otherwise treat the surfaces. It will look like new after that.

 

I prefer the saying "Mud is expensive". Pop the panel out and hit it with a pressure washer, that should clean it quick. If it made it through to the actual speaker, well then your only option would be to go through it slow and meticulously like the people above say.

 

You can also pop the side of the dash off and put a towel in front of the speaker......that way you can spray something of your choice through the vent without hitting the speaker. For things similar to that, I find spraying it with a cleaner and then using air compressor to blow the cleaner through works pretty good. Lots of good suggestions in the thread so far.

 

Y'all are great, I'll try each one as I get time since I have the rest of the month off, and I will get back to you with which way worked best!

 

I've found the best solution to be just leave it dirty! LOL. My interior is caked with dust most the time due to wheelin', then I wait so long to clean it after a trip that it doesn't make sense to clean it as I'll be heading back out in a week or so. I've just gotten used to a dirty jeep. I do hate those speaker vents though. They never look clean.