For washing windows, you can use special means, which manufacturers advise washing not only glass, but the entire plastic structure. In addition, in supermarkets you can purchase special detergents, which include the means necessary for seals and accessories. The price of such sets is very high, so Domozhozheyev always resort to the help of simple means. For example, “penny” glycerol can be oil seals, and accessories can be oil with simple petroleum jelly. Professionals advise performing this procedure 1-2 times a year to maintain the life of a plastic structure.