That would depend on what category clen falls into. I'm not sure if it will give you a false positive for anything or not. It has a relatively long half life, so it will be in your system for a while, other wise i would say use it and give yourself a home test.
Most likely it wont be a problem, but I'm not 100% on that so dont quote me.
I don't do this for my family, my friends, women, accolades, pride, or ego. I do it for me and no one else, its just part of who I am.