Toyota Repair: 2001 Seinna foul odor inside all of the time, mold and mildew, frigi clean

Question
It may be ac drain from what I have read , my drain tube seems to work fine, I've sprayed lysol into air intake and ran both heater and ac, smell seemed to be better for a few days but returned, I was going to try BG's frigi clean but haven't been able to locate item, I've also looked under van to find drain hose, haven't located yet, I can't believe that its just not hanging under van in plan site, do you think this product will do the job ??? If I can find it and the tube... thanks for any help John

Answer
Yes, the air condensation drain tube might be leaking inside the vehicle causing mold and mildew. Personally, I don't believe in many of the additives that are made for cars these days. My recommendation would be to take your car to a air conditioning repair facility.