Vinly siding?

They sell products just for that you spray on from your hose sold at Home Depot. I think one is called Wet and Forget?

Hi Keith, do you have a power washer? You would need to get on a ladder so be safe, and be sure not to use really hard pressure it will make a hole in your siding. Be safe

To get it all off you really do need to get up there and clean it using ladders or a pressure washer.

You can buy applications that are attached to a garden hose for cleaning. If you can reach it with a mop, that is a good method. Wet it and forget it is a product I have used successfully. Good luck and stay safe!

You could rent a power washer or hire someone with one to do this. We see vans with them advertising all around town. Sometimes signs posted on street corners.

Yes use a power washer. See some before and after pics on the house here:

https://karupp-did.net/power-washer/

there are numerous products on the market that you spray on and the sprayer goes up to 30 or more feet and leave it no rinsing or scrubbing, walk away and it works with the sun and wind to clean the mildew, mold and algae off siding and decks. You can find it at Home Depot, Lowes, even Sam;s. It's called wet and forget

You can spray with a cleaning product like KrudKutter, Wet & Forget Outdoor, or 60 seconds. Check for plant safety, if that is an issue.

Can you spray it off with a hose on a Jet setting or similar?

Hello,

Use a Power Washer - Borrow, or Hire or Buy..................

Like others have said, we have used a power washer.

Hello! We are trying this product for the first time that we saw on Todays Homeowner—on our house siding called wet and forget - outdoor and that the product works on mold and mildew problems - seems to be pretty effective you may want look into it and see if it’s a product you may want to consider.

We purchased the hose end formulation to spray our two story home without a ladder and it covers 2000sf for about $37.00.

Please look over link, reviews and Q&A to see if it’s a product of fits your needs as well as review the appropriate product size you need to purchase.

Heres product info to get you started.

WET & FORGET CONCENTRATE

MOSS, MOLD, MILDEW & ALGAE STAIN REMOVER

Are you tired of the never-ending cycle of cleaning black and green stains from your home? Introducing the easiest solution for eliminating these issues without using elbow grease or harsh chemicals—Wet & Forget Outdoor Cleaner! Simply spray and walk away! That's it. Wet & Forget goes to work with the wind and rain to gently clean the surface over time.

• Easy Spray & Leave Application
• No Scrubbing, Rinsing or Pressure Washing
• Bleach-free, Phosphate-free and Non-acidic
• Surfaces Stay Clean 1+ Years in Most Cases
• Safe for Virtually Any Outdoor Surface

https://www.wetandforget.com/wet-and-forget-concentrate.html