How does one remove? I've tried PBW, OXY, Bar Keepers Friend and those three do not remove. Would citric acid work or is there another solution?
No BKF didn't take it off.Barkeeper's didn't remove it? Strange. Did you let it sit for 15-20 minutes before rinsing? You could try citric acid. http://onlinebeerscores.com/blog/how-to-clean-a-brewing-kettle-with-citric-acid/
After brew day I did a hot water soak with PBW at 165 for 20min. I usually use Oxy but today I used PBW.
This did the trick. All the beer scale came off.
Have a couple spots I still need to clean but it looks good.