Water spots

We got our Scion Stingray in July, paid extra for the Finishtouch exterior protectant. We have never washed it with water, just waterless car wash by Smart Wax. My daughter got a smart idea one day and "hosed " it off. So next time I go to waterless wash it I can not get the water spots off the hood. With the supposed sealant I didn't think we could get water spots. I don't know if I should try waxing (I read here somewhere that waxing the sealant removes the sealant) or use something else or if I should take it to the deal and say "what's up?!" We paid good money to not have this problem. Any suggestions???