A chunk missing from the top spinner of my dishwasher stopped it from spinning; all my mug bottoms were covered in crusty soap. Sugru should be a good material to patch it.
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Step 1: Clean
First, you'll have to make sure that wherever you intend Sugru to stick is clean.I used a knife to scrape away some of the crusty bits and warm water to wipe up the rest.
Step 2: Insert Sugru
After everything has dried, fill the void with Sugru. I rolled it into a rope shape to make sure I was really getting it into the spinner. I only needed about 1/3 of a package. There was still plenty left to fix other things.
Step 3: Let It Dry
Let the Sugru dry and you're done. No more crusty mug bottoms for this guy!