The screen at the bottom of the mouthpiece of Utillian 420 and 421 gets clogged up. The replacement screens are identical to those that arrive with the original package. The screens filter the vapors that make the experience smooth and lets the user enjoy the session.
> Utillian 420
> Utillian 421
> Unscrew the mouthpiece and remove the older screen from the bottom of the mouthpiece.
> Replace it with the new one and attach back the mouthpiece.
> Enjoy your vaping now!
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