If you want to go the food-safe route, you can try the Q21Q21 tek that uses lime (calcium hydroxide) and d-limonene (orange oil). Lime is somewhat stronger base and gives good yields too. Many people had success with the tek.

Zippo lighter fluid is one of the best options for naphtha. If you are not sure, do an evaporation test (i.e. pour some on a clean glass and leave it to evaporate - it should not leave any traces behind). The lighter fluid is usually very pure.

Another options are VM&P Naphtha, heptane (Bestine) and several other items depending on what is available in your location.

That's okay, even better.