If you do it quick enough you can get away with just rinsing the bags with cold water after you are done. Alcohol cleaning is optional.
You can rinse everything down inside the bucket/washer to be sure you get it all but I don’t...most of it comes out with two washes but if you want to be sure you get it all you could rinse it out into the bags with everything else.
I learned a lot watching Bubblemans bag technique, even though he’s kind of a douche.
When you make hash from organically grown bud you notice the difference in the quality of the trichome. This is why we do all this shit.