I've been using sunscreen all summer and noticed my Coach tote is stained by the sunscreen. I googled to find a solution to get rid of the stains and tested on a small spot on the tote. It did not seem to work. Since sunscreen contains oil, the stained area is sticky now. Does anyone have a good method or product to recommend? I only used the tote for about a month and really want to make it back to good condition, especially my bag is black - with white sunscreen, it looks awful.