Ex put twix candy bar in gas tank,should i worry or will the gas dissolve it?

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Ex boyfriend put twix candy bar in my has tank... I don't have money to take it to a mechanic. I haven't started the car yet its been 2 days . Will it ruin my engine or will the gas dissolve it ? I'm scared I don't want to ruin the car. The car has been well taken care of only one owner. Please help