Thanks for the info on the Murphy's Oil Soap. I have a painted deck that sits directly under a large tree and boy does it get sapped. I dread cleaning this every year since it used to take hours using other chemicals that were somewhat caustic and not environmental friendly, and only did a mediocre job at best. I think I skipped the job last year. I just used the Murphy's Oil Soap and it made the job so easy and quick, and my deck looks great again! It is as clean as when I painted it, and the finish has a sheen. I was even able to dilute in my case and get great results (1 cup/gallon water). Cheers!