Well I'm just getting back into them as I ended up back on the cigs , takes me quite alot longer than a couple mins to polish and clean probaly cause I'm still new too it idk. It's always in my room I don't really bring my tubes outside never thought off lettjng it all sit in soapy water tbh I'm deffo gonna do that next time, can all the parts go into the water okay?It really depends on how much you use it and if there are other factors like juice spilling or if it was in dirty environment, outside etc...
Something like once one in 2 weeks. It only takes like couple of minutes so it's not a big deal and I do it when I feel like it. Also, like to dismantle the thing and dump it in soapy water for an half hour to soak. Then dry it and assemble again. Works nicely for those nasty spillages for example.
Thanks in advance for the help!