firepaint

I left the company I was painting for about 5 months ago to start my own business. I have been painting/pressure washing for 4+ years. I’ve been washing decks using a pump sprayer, deck brush, tire brush (for spindles and corners) and a pressure washer (with low pressure). I’ve used BM’s Clean and krud kutter. After I wet the deck I spray it down with cleaner, scrub with a deck brush, and finally rinse with the pressure washer. I am finding that more often than I would like I have to go back and do a second round of cleaning to get the job done right. If I’ve got to go back and do everything twice I will, but feel like I am missing something or doing something wrong. If anyone has any recommendations as to what I am missing or doing wrong I would greatly appreciate it. Any cleaning products recommendations or techniques would be greatly appreciated.