You did a good job and saved yourself money. When it comes time to clean them just use vinegar water to clean then. I use an old toothbrush for that. 1 or 2 tbsp. per quart of water.
I adore POOP OFF! I actually have used it to clean my stove top because whatever enzymes it uses that are fabulous for breaking down bird poo and caked on fruit paste is also good at cleaning up spills on the stove top or wiping up after our dog. There are probably cheaper ways to make a cleaner that is safe at home, but I love this cleaner for everything!