Hello all, I'm brand new here and wonderd if any one can help. My 05 try makes a worrying sound simalar to a heater from the battery area under the bonnet as soon as I unlock it. Lasts for 30 seconds or so then again as soon as I open door. On cleaning interior the other day battery was completely drained. Should I not clean the interior in fear it will drain it again. Many thanks in hope. Thankyou all. Stevetd6