So it's pretty simple. Heat up some vinegar (I used a cup of vinegar and nuked it for 2 minutes). Then pour it in your spray bottle, add an equal amount of blue Dawn (the website comments were pretty specific about getting the blue kind), shake gently, and voila!
Again, that's a one to one ratio of white vinegar to blue Dawn. I measured out a cup of each originally, but only used about half of my bottle. So next time I'll just do a half cup of each. The whole point is that the white vinegar is heated up, and while I haven't used it with it being room temperature and don't know if it'd work just as well, I'd rather just make it fresh each time. Especially if it's going to give me super clean results.