Our pool has been completed since early February and we haven't even used it yet but the bees apparently think it's pretty great! I noticed them a couple weeks ago hanging all over my ladder and sitting on the solar cover, probably 75-100 at a time. I pulled the ladder thinking that would deter them but they continued to hang on the solar cover so I pulled it for a few days and just resulted in a tree debris filled pool. They've started hanging on the walls around the coping and just kept coming. I called a bee guy and they said if you can't find the source/hive there's not much he could do. I did a little reading and found that mixing Dawn dish soap with water would eliminate them, not what I wanted to do but I also can't have hundreds of bees in our pool when the weather finally warms enough so we can enjoy the pool. I filled up one of those generic spray bottles with 1/3 cup Dawn and 1 qt water and headed out, it works but it was like taking a knife to a gun fight. I then picked up a 2 gallon weed sprayer and filled it up, I should also mention what I read was the key to getting rid of them was to stop them from returning to the hive to bring others back with them. It took me 2 good days of bee patrol and running Mrs Salty out of Dawn but I'm happy and somewhat saddened to say they're gone, I didn't have one single bee around the pool all day today.