A Florida gas station owner says she is battling a bizarre problem β customers using the microwave to heat urine. Parul Patel, who owns a BP gas station and convenience store in Jacksonville said random people are walking in and βitβs happening every day.β Itβs gotten so bad, Patel says, that she had to post a sign on the microwave that reads, βOnly for food use. Do not warm urine.β Patelβs convenience store is located steps away from LabCorp, which offers drug testing services.