It could have been the pressure wash. That really opens up the wood.
I think it's best to avoid pressure, or do it very carefully with the lowest pressure and widest pattern. My neighbor pressure washed his, and his kids are always getting splinters, it just lift s the wood fibers too much.
I just brushed in and hosed off the Wolman brand Deck Brightener. That stuff worked so much better than the other I bought (might have been Thompsons), that I saved the empty and marked on it "BUY AGAIN". It's a powder, and IIRC, it changes color as it works so you know when to rinse it off, I seem to remember the other stuff just foaming, and I couldn't tell what it was doing. They both worked, but the Wolman just seemed 10x easier to use.
I've let all my decking go for years - decided I wanted to change colors, so I'm letting it all wear off. It's worn off, except for a little on vertical surfaces. Will do it this year. I'll not be posting while I'm staining the deck.
-ERD50