Hey WaterBear, our resident beauty expert & chemist... ( & chemgeek too)

Is there something that I can mix up & spray on my hair to neutralize chlorine & bromine ?

The colouring in my hair is being stripped out.
I only colour my hair every six months or longer periods. & I usually attempt to match my natural deep dark brown ( to cover up the silver... yeah I said silver, not grey, not white); otherwise I look like I've got s.o.s. pad head going on...

anyway, my re-growth is getting lighter, but still ( slightly reddish) brown ( & silver), but the coloured portion ( about 90% +) is getting lighter & lighter... goes from deep dark brown ( some people think black) to red-brown to golden-red with blonde to... no colour. I'm sure when viewed under a microscope, you'd see two copper sides with clear in the middle ( of each hair).
The coloured silver ( which would have been coloured to brown), turns copper & then gold.
I'm sure UV is also affecting the changes, but the sanitizers are really doing a number here.

typically I don't wash my hair after being in the pool & hot tub because I'm too busy doing safety stuff & then getting all the kids dressed, so I'm looking for a spray-in & leave-in neutralizer...
would be fabulous if I could make something at home for this job.

thanks for your help