If you find that some of your food turns into Grimy Food, use it to your advantage! If you are a fire type, poison-type, or have a heal seed ready, eat the food! It will fill your stomach and get it out of the way! Fire-types can't get burned, and poison-types can't get poisoned! The other side effects can be cured with a heal seed!
If you don't feel sucure eating Grimy Food, feed it to your enemies! Whatever can happen to you can happen to them, right? Grimy Food works great as a throwing item! Just think of the Grimer trap as a blessing when it affects only not so important food like Apples or Plain Seeds, you won't miss them much when you have a offensive item instead!