My main man Kemosabe told me about this one real simple method that gets the carto, almost, entirely empty without the hassle of washing and waiting. It is the reverse taryn spin. It can either be rigged to just let the juice fly out, outside obviously, or to catch the juice in a condom. I have used both ways, when I actually used cartos, and either let one juice fly or caught another in a condom that was taped to the open end of the carto. I was completely amazed by how well it worked. note***some flavors will essentially get trapped in the poly fill and will not come out, like cinnamon, without washing...heck, cinnamon barely comes out with washing.