I started vaping in 2012 so I'm from a time when every tank came covered in machine oil and all that other unpleasant stuff so anytime you got something new you would need to break it down completely, scrub it with Dawn dish soap, and reassemble before ever considering using it. And sometimes that didn't even work, had to wash it several times. Have things changed as far as new product cleanliness? I see all these sub ohm tanks and can't imagine needing to clean them before use. Same question goes for RTA and RDA, do we need to scrub the living hell out of them before use? For reference the newest thing I have is an old Griffin 25 with a velocity style deck from around 2016. Before that it was an original Kayfun so I don't change equipment very often. I'm on the verge of purchasing a profile Unity to give this mythical mesh a good try so any help would be greatly appreciated.