Best Deck cleaning product if not restaining?

Surprisingly, my deck seems to be in good shape despite having applied Behr semi transparent stain last year. (Before I found this forum, I had no idea the Behr was one of the worst stains). My deck stain beads up well and has consistent color/tone. It doesn't seem like I need to reapply a stain this year. Or should I bite the bullet and use Restore-A-Deck cleaner and restain while its still in good shape?

What product do you recommend for just cleaning it if I don''t reapply a stain? Should I use my power washer or just a deck scrub brush?

FYI -- this site has been very helpful.