Hi all. I have a two month old Bennington 2275GL. It has a black cover over the ivory seats. In three areas were the seams are on the cover I have black stain on my seats. I have tried Starbrite Mildew Remover, Simple Green and a mild dish washing soap. (Obviously not all at the same time.) Nothing has worked. The dealer said try the Starbrite. Needless to say I am not real thrilled at this point and was wondering if anyone had suggestions before I head back to the dealer......