In article .com,
"Red" wrote:

I have found that detergent is rarely necessary

After the purchase of my 2400 psi, Honda-powered (6.5hp) washer, I did a
little experiment on my deck in preparation for staining.

I bought a gallon of expensive Deck Wash concentrate. The jug pictured a user
with a little, electric-powered washer - appropriately so.

I treated half of the deck with the deck wash solution and the other without
it.

Conclusion: At 2400 psi, detergent is irrelevant.
--

JR

No project too small
All projects too big