I have a black truck, and I tend to see a lot of dirt, but I have these streaks under my window, and a bit under my mirrors. Any way to fix it? They do rub off, but reappear every time it rains, I tried cleaning the cracks as well, but hey, they're back! Pictures:

 

I get that too, not much you can do about it.

 

I don't get them. Wonder if its an extended cab only thing or if I just have never paid much attention.

 

i get that too...just keep washing it...haha

 

Mines a quad cab, I think it's just the silver paint hiding it on yours. I had a silver car that pretty much always looked clean.

It's the area where the water runs down during rain storms.

 

Same, I dont get it by the Mirrors to often tho, rear windows all the time.

 

We need to fix this! Lol

 

for me I get it at the door handles, possibly the mirrors and on my tailgate under my giant ram emblem

 

More of an issue than a problem. Deals with what dust/dirt/road grime that gets collected around the mirrors and windows and the paths rain water takes while running off the vehicle. Happens with all of them, certain colors show it more than others. We won't even talk about all the nasty crud that comes down with the rain itself nowdays.

Doesn't matter how well we clean the darn things either. First run up the road and we start collecting the dirt again.

Can't get rid of the issue, but can help keep the streaks to a minimum by keeping a good coat of wax on the paint.

 

My guess would be that the gasket or sealant that's common to all of those components tends to leach out the color to a small degree and then the rain, washing, etc., would cause that color to make those streaks. You can see a similar issue with some types of metal siding on houses, but in many of these cases, the color coating on the siding oxidizes and this oxide washes off with rain to cause the house streaks.