Plugin did not fix my feed

hello,
you were my last hope.. but no fix.
I have worked on this problem for about 18 hours. I removed all plugins and reinstalled one after the other, no change, I went throuh the .php files and had no blank lines and no luck.
than I found your plugin and no luck
now I am gray haired old man.
this problem began with wp 3.7.1, my websites with wp 3.6 still work correctly
this is one website I cannot fix https://12hourdealsforyou.com/
Thank you
Michael Schurmann
[ email redacted ]

XML Parsing Error: XML or text declaration not at start of entity
Location: https://12hourdealsforyou.com/feed/
Line Number 3, Column 1:<?xml version=”1.0″ encoding=”UTF-8″?>
^

https://www.ads-software.com/plugins/fix-my-feed-rss-repair/