Before I ask I will like to say that I did use the search function and I did try and find the answer.
I’ll be washing a house tomorrow that was near a fire (the owners are worried about possible soot even though there’s none visible). So I was thinking regular SH mix (I just DS straight 10% and elemonator, usually hiting the wall from .8-1%) and adding a small amount (12oz per 5 gallons of mix - I’m planning on making seperate mix in a 5 gallon bucket since I’m only going to use it on this one house) of degreaser (I’m out of EBC so I was just going to use ZEP degreaser).
After reading a bit it seems like it is perfectly safe to mix the degreaser with SH and DS, but I just wanted to double check everything. Siding is painted hardie plank.