We have a power worx battery powered pressure washer. We have two collection/pump points in our woods. Each has a stainless tank. I will scrub the tank each time as the sap is being pumped. Then I used a 5 gallon bucket of hot water with te power worx sprayer to rinse and then srub and major areas I missed during the scrub during pumping. I also wash areas around the tank to help keep the area clean.

As far as color/cloudy/odor goes I pay attention to it. Should the sap be offensive then I will weigh the options (I haven't experienced this). We normally get to smelly sap/syrup during the boil. When it smells like dirty socks we finish the container we want to fill and call it a season. There are faint hints of the odor from the raw sap, but it is not bad until concentrated and boiled.

I don't want to sell bad syrup, but I know some people want the really dark and odorus syrup so I finish the one container then call it because it's likely not worth the fuel to contiune to boil.

Mike