One of the front windows of my caravan is developing very heavy condensation between the 2 panels. I have removed the 2 bungs at the top & have tried drying it out by playing a hairdrier on the outer panel on which the condensation is forming,but I have not managed to clear it all,this morning it is actualy running down the inside.Has any one managed to cure condensation??? I do not fancy paying out £300 + if I can help it