Sounds weird but it works!
I'm a swimmer and i know it sounds weird but it really does work, my suits last longer than anyone on the team.. If only they would listen to me...
When you rinse it add a few drops of the stuff you buy for fishtank to neutralize the chlorine to the water... It really does work!! and its cheap and last forever
Either that or buy the poly suits, i'm 12 and one of the ones i wear i have had since i was 9 and it looks brand new i've worn it several hundreds of times atleast!