Yes,bleach breaks down the plasticizers in the vinyl and other plastics-to sum up DO NOT use bleach on plastics.I wash my vinyl curtains without bleach and they turn out fine.And you are like me--I HATE shower doors-curtains are much easier to maintain-and if the curtain is really dirty or mildewed-just toss it and get a new one.And shower doors may have another fear-I don't want to fall on one if I slip-A curtain is soft and won't break and cut you to ribbons!Also when I wash my shower curtain-if its winter-use the WARM water rinse-the winter cold water temp will cause cracking.If I had to move into a place with doors-I would rip them out and put in a curtain pole and curtain!