Im not familiar with the cordysyl mouthwash you are using. Ask your doc for something called magic mouthwash. Its a prescription formula and can be made several different ways. Mine was benedryl, malox, and lidocaine. It will numb your mouth long enough for you to eat.

As far as the Manuka Honey goes, it has not been officially trialed and proven to work. However, several members on here have used it successfully. There are several different strengths available at the health food stores. Im sure someone who has used this will help guide you.

Here is a list of easy to eat foods that might help.

http://oralcancersupport.org/forums/ubbthreads.php?ubb=showflat&Number=94621#Post94621