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Thanks for your input! I contemplated the grain crush size, and in fact I changed it from 0.025 on my mill (whatever are those units) to 0.04 between #1 and #2, just forgot to mention it, and it didn't have much impact on preventing burn. Worth mentioning that I used the finer crush, as I said, for 2 yrs without issues.


Same applies to wort clarity and particles. I brew in a basket, and admittedly the #1 was on a newer basket, that perhaps leaked more particles than the old one through sides. But the #2 was mashed with a nylon bag inside the basket, which prevented any side-leak, and no much impact on the burn.


My plan for now is to try pure Gladfield pilsner bill, and if it turns out without protein gunk I'll try the following batch with mix of GF and JW, same everything else, grain-wise. If gunk appears again, that will have to mean that my system is not JW-compatible :)


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