I have always thought that good ideas should be shared. We boat on Texoma frequently and it's salinity can turn a beautiful boat into a dirty looking, spotted, ugly thing. I've tried nearly everything over the past decades. Until today, the best I had found was an $18.00 per bottle "Hot Sauce". It cleaned off the water spots quickly and it was obvious from the smell that the main ingredient was vinegar. I remembered back in the day how we used straight vinegar to clean our aquarium when it got spotty. So, I bought a good spray bottle from Dollar General, a gallon of white vinegar and started working on a mix. 50:50 each water and vinegar worked great!!! Cost was much, much less. Today I was down to about 1/2 of the spray bottle's contents, and I remembered another ingredient I wanted to add. Hydrogen Peroxide (H2O2). The mix is about 1/3 of each: water, white vinegar, & Hydrogen Peroxide. I just came from cleaning my boat and it was wonderful. A micro fiber cloth and the spray cut through the Texoma junk very easily. I'm not sure of the exact cost, but it is well below $18.00 a bottle and it works great. Enjoy!