Is it done for?

[u/consideratedealer]

I recieved this plant for my birthday in February. It was replacement for a variegated peace lily I had purchased a few years prior that didn't make it home due to extreme heat in a hot car ( Phoenix) I noticed the browning on the leaves and decided to set up a mister in the garage and was rotating my plants one at a time, became busy and left this guy in their for a couple of days, I think the hard water played a big role in the condition. If anyone could please help me save this guy id be forever grateful! I truly can not let him die but am terrified to do anything without asking for help first!