I found myself doing that lately...i dont know why 
Yes. Some juices need it a lot more than others, but it's a good habit to get into lest you vape all the flavor at the top of the bottle and be left with tasteless crap at the bottom.
I found myself doing that lately...i dont know why![]()
No, I didn' think it made a difference but now that I think about it. My Rath VG juices are not as tasteful as what I have read but I never tried shaking bottles, will do so now and retry.