Airistech Herbva 5G

The Herbva 5G packs 0.2g of ground herb into a small ceramic chamber sitting directly under the magnetic mouthpiece, and the vapor path between the two is very short. Resin condenses on the underside of whichever mouthpiece is fitted and around the airflow hole almost straight away, while fine plant dust gets pressed into the corners of the chamber every time you tamp a load down.

1. Switch it off and let it cool: Five rapid clicks powers the pen down. Airistech's manual is firm that you should not clean or take anything apart until every part of the device has cooled completely, because the chamber walls stay hot well after a session ends.

2. Lift the mouthpiece and empty the chamber: The flat plastic mouthpiece and the glass one both hold on magnetically, so they pull straight off with no threads to unscrew. Tip the spent load out, then use the dab tool from the kit to lift anything baked onto the ceramic.

3. Brush the chamber, never soak the body: The only method the manual prescribes is the included cleaning brush, worked gently inside and around the heating chamber. It also says not to immerse the device in liquid of any kind, since anything reaching the heating element will ruin it. Keep isopropyl off the body and away from the charging port.

4. Clean the mouthpieces off the device: Because both come away completely, they can be dealt with separately. A cotton bud dipped in isopropyl clears the bore and the magnetic face. Rinse and dry them fully before refitting. Airistech sells the flat and glass pieces as a replacement pair, so a cracked glass stem is a cheap fix.

5. Keep the airflow hole clear: A clogged airflow hole is what makes an already gentle draw feel tight, and the brush bristles reach it. There is no screen or filter to swap out: the parts list stops at the mouthpiece, chamber, airflow hole, button and charging port.

Airistech's own guidance for its dry herb vaporizers is a clean every 10 to 15 sessions, which on a battery good for four or five sessions works out to roughly every second or third charge. Two other points matter. This is a dry herb device only, and wax or oil dripping into the heating element will damage it permanently, so do not treat the ceramic chamber as a concentrate cup. For the internal battery, a full charge takes about two to three hours from empty, the charge light goes out when it is done, and a red LED flashing ten times means the cell is nearly flat.