Because I don't have a lot of space to spare, and I don't use OA baths very often, I use a window planter box. This allows me to get four sides of the main diamond in the frame as well as the entire fork. The only tube that this setup cannot bathe is the seat tube. However, that is the most accessible of the tubes on the frame in terms of getting into it from the top. It can be cleaned via another method, such as using rags.