Ha. I don't. I'm fundamentally a lazy man.
And a lot of the better steroids require things like nolvadex (post cycle therapies) which is essentially a cancer drug. You need to do blood tests so you don't bollock yourself. Its all around effort.
If my best mate supplied them to me. And I could guarantee consistency and ease I may well do it. But really I'm a 7A punter. I could lose 5 pounds to gain an edge.
I consider SARMs periodically and I wouldn't rule it out. But they'll become illegal to buy at some point.
And currently there aren't many dealers in climbing gyms (that I know of). I'd have to do my conditioning in a regular gym. Effort.
To do steroids safely and well one really does have to do a looot of research. Essentially amateur chemistry. So no, I don't.