beware wisteria attacks white clothes!
I thought I might let you know rust spots that kept appearing on whites fresh out of the washing machine. Rust spot was not visible on the clothes when they were put in the washing machine. This kept happening to me and I was puzzled...I cleaned my machine; checked the filter for metal hairgrips; changed my washing powder. Then I read something that led me to believe it was sap from wisteria. I decided to test it by cutting the end off wisteria vine and rubbed it on an old white cloth...nothing to see. Put it on a warm wash and hey presto the cloth came out with a rust spot which cannot be removed even with bleach. It's something to do with oxidation.