Hi, Went for a first clean this morning at a customers house only to have to walk away because of problems i was having with the windows. The rubber seals were making such a mess when i applied water and fairy to them (trad) that it was near enough impossible for me to clean the windows, it was like boot polish or back to black had been applied to the rubbers and was running all over the white pvc, so out came the cif but after about half an hour of messing around i told the customer i would have to leave the windows and seek some advise! Seals look in good condition, not perished. Any ideas how to resolve or is it just new seals? It was literally like running you finger over black boot polish.