streak free windows.

Wilbar
Wilbar Forum Participant Posts: 26
edited July 2013 in Caravans #1

My van windows appear to have a light grease coating on them, we had a diesel leak some time ago whilst towing and  I wonder if it could be that that sprayed the van. Although my husband has washed the van several times. I have tried pamper van cleaning
product, washing up liquid and even vinegar. But cannot get rid of the streaks. Please advice before I cause damage.