Are you using RO water? Or tap water?
I used to have a huge problem with calcium in my tap water.
My water company had a lime reactor just upstream of me, and I was at the end of a long pipe run with no branches, so my faucets all clogged up periodically with precipitated calcium. (It was pretty rough on my RO membranes too)
After a year of dealing with this, I contacted my water company and they investigated my problem, discovered the above information, and addressed it in a matter of a few days.