Snag $75 of amazing St. Tropez products including Body Polish, Bronzing Spray and Body Butter. Click to find out how.

Tell us your self-tanning horror story in the comments below and how you could make up for it with St. Tropez. Our favorite story will win you this amazing set of self-tanning products.

I got a chance to check out tan expert Sophie Evans at Sephora this afternoon demonstrating her skills in the St. Tropez Tanning Masterclass. What makes the perfect self-tan with no mistakes? Check out her answers below and comment for your chance to win these amazing products.

What makes for an even, non-streaky self-tan? Self tans go streaky and patchy because people are scared to use them and try to spread a very little amount of product over a large surface area of skin. When it stretches, it streaks. Make sure the skin is covered with product and you can see it properly.

St. Tropez is built so it doesn't streak. What makes it different from other self tanners out there? It has a high level of tanning agent so the skin won't need to absorb all of it. If there is not enough, that it when the tan looks patchy. As long as your skin is completely covered with the product, you can't go wrong.

What's the best way to make your self tan last as long as possible Be gentle on your skin - pat it dry and don't use harsh products. Sweat will make it fade faster as well.

To learn more about St. Tropez and all their fabulous products, check out the website at sttropeztan.com. And don't forget to tell us your self-tan horror story in the comments below to win these three fabulous products.