Thank you so much to everyone who participated and I hope everyone learnt a few tips and tricks by reading through the other responses.
Please note that entries for this giveaway are now closed and the winners will be contacted in the next couple of days.
Thank you everyone for your participation!
I just wanted to announce that @Suzishimi (from the forum) and janet_heise (from Twitter/X - also known as @Janet.t.h here on the forum) have been chosen as the winners for this round.
If you would still like the chance to win an AirSpot monitor, there will be another giveaway soon! Please keep an eye on X and the forum for the announcement.
Thank you @JordanAirSpot and the AirSpot team once again for organizing this 
Thank you for entering this competition, to let us know what your best tip is for keeping indoor air clean and healthy.
We would like to offer everyone who entered a discount on AirSpot devices and accessories!
Simply go to http://airspothealth.com/ and enter the code BreatheSafeAir2 at check-out for 25% off.
Valid until November 30th
There is now a new giveaway live and you can enter here:
@here if you would like another chance to win, you are welcome to join!