I have a large 8 foot pleated shade in my living room window. It is only about 5 years old but when it is pulled up it looks dirty and dingy. I cleaned it with the vacuum and some sudsy water but it still looks dirty. I hate to take it down as I need it for the sunlight during the day but they are so expensive and I was not looking to replace it at this time. Any ideas on a way to clean it. Also, has anyone heard of fabric spray paint, and would that work?