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I just splash and go with mine and never would I say they became anywhere near pliable. I also hardly ever lap them anymore either and just use a slightly rolling X stroke where the edge contact...

I have Naniwa super stones, 1K, 3K, 8K, 12K and a 3K/8K combo which was the only one that warped on me. Prior to use I just spray water on them and use. My guess is that the 3K/8K combo warped...