So, I was told by Maggie a few weeks ago that Cleancaf was a little too harsh on the Evo's aluminum boiler. However, it appears that you are either out of the Gaggia Descaler or you do not carry it any longer. What is the recommended descaler?

Also, it appears that the group group pressure valve may be malfunctioning as I now get a significant amount of water dripping from the group after water is sent thru and there is a LOT of steam set thru the group while steam is on. Is there a way to clean or fix this or do I need to replace the valve?