My best advice is to use chemical free cleaners in your bathtub and install a water purifier to your shower and bath spouts. Instead of swimming in chlorine, some women with IC have found success (ie no bad after affects) in swimming in therapy pools which can also be installed in your home and are 100% chlorine free. Another option is to find a natural hot spring that you can drive to and soak away the pain and discomfort of having IC. I have always found that the steam and heat of a hot spring does wonders for my mental and physical state. I am fortunate enough to live in CO which has 15-20 hot springs within driving distance of the city in which I live. So consider the positive (or negative) affects that water might be playing on your IC symptoms. There are always safe, natural alternatives out there if you have the time to do some research.