Replying to Minor girlfriend problems- advice?

So like every one else, my relationship has its ups and downs. Lately, one of the downs has been a bedroom issue (I'll try not to be too graphic). You see my girlfriend and I often engage in fellatio, from which she pulls the ol' "finger trick". I'm not ashamed to say it, it's feels great and makes the fireworks a lot better. The problem though, is she's sick of seeing my hairy, ashy skin. I've already shaved but the ashiness of course still remains. So my question is what's the cheapest anal bleach I can buy? I'm looking for the cheapest alternative (preferably something I can order online to save myself from that "cashier-sees-what-i'm-buying shame), even household means. Can I use regular old bleach to bleach my arsehole, or should I go with something store bought? I'm looking to spend under 5 dollars, any help???