Getting a Deck ready to Stain

My deck is 10 years old. Standard pressure treated 5/4 pine. Has been stained twice using Penofin. I am happy with the penofin, but the deck is needing a good cleaning and restaining. I have a power washer, and I would like to use a cleaner that will not harm the vinyl siding and the plants around the deck.

I have read the do's and don'ts of using a power washer, just wanting to know what type of cleaning agent to use. I have a little moss, maybe 5% of the total deck has a little moss. Otherwise, just plain old atmospheric dirt.

Oxiclean in solution with some simple green? Specialized deck cleaner? What works and what don't?

How long to dry after cleaning before staining again? Thanks, KD

The deck is is good shape. The stain is a translucent exterior deck stain, but similiar in appearance to a typical wood stain for furniture and such, but is made for decks. It is actually good stuff (but not cheap): http://www.penofinstain.com/penofin-blue-label-1-gallon

I ended up mixing a solution of laundry detergent and oxi-clean, soaped it up, worked it with a stiff broom, rinse, and repeated. I made sure to wet the plants down before and after, and they seem to be OK so far. Used the power washer to blast off the soap and dirt from the deck. Did not "fur" any of the wood!. Worked pretty well. It did a noce job on the vinyl siding also. Now gonna let it dry and then stain it after the holiday weeked. Thanks, KD