Being new to grout cleaning, I've been trying to clean mold from the silicone gasket on the bottom of the shower. After 10 minutes of work I had broken a razor blade on both sides of the yellow tool. This was the only tool I've used so far. Maybe this is user error, I opened the kit and got this tool working. It may have been user error. I've tried many chemical products and just wanted to get the job done! I ended up hiring someone to come and remove and re-tape the shower for me.
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