Never.
I've worn it three times in five years, had to get it done by others. Don't even own it.
That's about the same for me too. Although the last few months I look sooooo crap from lack of sleep I was thinking I could probably do with a little something so people stop asking me if I'm ok Only problem is I wouldn't know where to start or what to use lol

I also don't like the feel of it when I have worn any, and can't wait to get it off!