I have (had) that too to some extent. Initially, I had to go to the bathroom after a meal to rinse out my mouth. It should get better, but you can also select/avoid certain foods. You are probably missing the more sticky saliva.
Try heavy cream .... worked for me.

M


Partial glossectomy (25%) anterior tongue. 4/6/07/. IMRT start @5/24/07 (3x) Erbitux start/end@ 5/24/07. IMRT wider field (30x) start 6/5/07. Weekly cisplatin (2x30mg/m2), then weekly carbo- (5x180mg/m2). End of Tx 19 July 07.