I started to make my own HCA, mixing 20g of sodium sulfite to 1 liter (2%) as a working solution. I noticed that when I poured the solution into the tray that the last 10% or so were not as clear as the rest (the solution is a week old), but it seemed to mix OK. After fixing, I power-washed for 5 minutes and then used the HCA for 10 minutes, followed by a 30 minute wash. Then, I wiped the prints off (squeegee) and hung them to dry. I noticed later that the wiped-off liquid turned white. Apparently, some of the HCA is still in the print after a 30 minute wash! Questions: 1. Does the residual HCA harm the print? 2. What is the best way to deal with this?