What should I soak my Neem oil sprayer in after using it?

[vp999]

Hello guys! I always have problem with the Neem oil and crap caking on the bottom of my battery operated garden sprayer and clogging it up. I normally mix Neem oil and 3 in 1 pesticide together and there's always clumps in reservoir. What do you guys soak your sprayer in to avoid Neem oil clogging? Thanks in advance.

 

[Wires_Guy_wires]

Hot, very hot water and dishwashing soap.
The gunk can be a problem, but it becomes liquid again if you heat it.
But I'd have to act immediately, the longer I wait the harder it gets to remove it.

That's also how I emulsify my neem oil, with hot water and dishwashing liquid soap. If neem oil keeps floating up top, I'm using too much neem oil or too little soap.