D.S.
I always use FOLEX to remove hard stains and dried up food, or gum. You can find it at walmart target in the cleaning section. Its always hard to find, and or in the bottom row. VERY CHEAP but POWERFUL.
Tip....it cost around $4.00 to $6.oo
and always let it soak on the stain or food for about five mins or longer. It almost seems to suck it up from the HOPE THIS WORKS FOR YOU...GOOD LUCK!!!
D...mother of 4 (2)-17&2 girls (2)-10&7moboys