Kaz, that is a great idea, I will try that next time I do my shower. I usually do it by throwing bicarb around the place then squirting it with vinegar out of a spray bottle.

For benchtops & stovetops etc I mix it in a glass jar, a few tablespoons of bicarb & then add the vinegar until I get the consistency I want. You can store any left over too, although you may need to add more vinegar when you use it next.