I was looking at my top today and found a dirt line in the liner right behind the seats. I know this has been talked about before and it was though the roll bar was causing the mark. I can tell you I clean the top of the roll bar every week. I think the dirt line is from the top being down and air going though it like a filter. The line is in the first fold, when the top is down, that has the loop sticking out the sides.
A friend told me it was just one of those costs of a soft top.
Trying to clean it just might make it worse unless the whole liner comes off and it can be cleaned as a whole. Then, you might be able to scotch gard it.
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