So my neutrilizer went out a couple weeks ago and I just noticed it and got it fixed. My problem is my toilet got a yellow film on it during the 2 weeks i was running the water without the neutrilizer. I got the toilet cleaned and it is staying clear. But the shower floor will not clean up. So i believe that the hot water heater got that same yellow film built up inside it and thats why i am still getting the staining only wear hot water comes into the house. So my question is how do I clean the yellow film from the inside of the water heater?