Any suggestions on how to wash this deck

I’m looking for the proper was to wash this deck and railings using a x jet. Thanks chris

Depends on what the customer wants. Are they staining with the same product and color? If so, a 1.5% bleach/soap mix on the wood followed by a good pressure washing should be fine.

Otherwise, it is a strip job and the vertical wood is going to be difficult. Hard to be definitive but from the pics it may very well be a water based stain product. And the wood/condition does not look like it is worth the expense.