How do you guys wash your car with hard water?

We have real hard water out here in the country. My family got me this one year for daddy's day.

[ame="http://www.amazon.com/gp/product/B0016GXL6C/ref=pd_lpo_sbs_dp_ss_1?pf_rd_p=1535523722&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B0006M56CE&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=19S2A4GP0MTEC62B32RQ"]Amazon.com: Mr. Clean AutoDry Car Wash System: Everything Else[/ame]


It looks gimmicky as all hell but the damn thing WORKS.