Like others here I type mostly by touch. However, I did have trouble with the little bumps wearing off of F and J on my home row, so it was harder to get oriented on the home row. I tried various things like nail polish, glue, stickers, etc., but they would just wear off again. I finally found a solution. I popped the F and J keys plus a couple of others that I needed to find quickly off the keyboard and used a drill to drill a small hole in them. This has worked for me for a long time.
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