Grab one of those dish sponges, the kind with the handle that you fill with dish soap to clean the dishes. Fill it with vinegar, and you have a powerful tool for cleaning the shower. Add a few drops of tea tree oil or lavendar oil to help disinfect and to give it a fresh and pleasant odour.The one I have been using has just straight vinegar in it and I keep it in the shower. I give the shower a quick scrub down before I get out. I hadn't cleaned the shower in a while and it cut through soap scum like nothing else! Surprisingly, I didn't notice a harsh vinegar smell. Not even a little bit!
Other Tips:
Buy a good quality dish sponge. They are designed to hold dish soap, not vinegar, so cheaper ones will leak more. I keep it hanging handle-down on my shower caddy and doesn't seem to leak. I also bought one that has a rougher scrubber on the end. I knew that a straight sponge wasn't going to be effective to really give my shower the deep clean it needed.
Add dish soap. If your sponge leaks, consider adding some dish soap to the vinegar. It will make it a little thicker. My guess is you may have to be prepared to give surfaces a rinse after though. When I use straight vinegar, I don't bother rinsing.
I am going to keep one under the sink in each bathroom, and by the kitchen sink. That way I can do do quick, cleaning on the fly in about 10 seconds flat. Ah! Now that is green cleaning for the 21st century!
