hi cb and MY- never thought of vinegar. do have a bottle of deodorized clear Heinz vinegar. think that would be best? thought of h2o2 hydrogen perox. didn't know you could get it in 20-30%. figure the 3% used for medicinal purposes wont do any good- too weak. where can you get the higher concentration- hardware stores? thanks tons oldduke btw there is a rain leak from somewhere but only when it rains like a nam monsoon. btw #2 does the 92 240 volvo have a flushout channel in the firewall where you can blow out clogging leaves, etc. with ahose. have heard that that problem can cause leaks onto the floor. many American cars have this flushout