[gkhn]

Good to know thanks.
I knew there were using chemicals but didn't know they were that harsh!
I do take mine maybe twice a year in winter when I feel lazy to clean the car.
Still 1000x better than brush ones.

Originally Posted by GasoLane

As mentioned it's the Chemicals. One member on here runs a hydraulic hose business and has told me that in the car wash places he goes to he replaces their Stainless steel hoses every two years.