'Cool in 90 seconds' - the fake portable air conditioners sweeping the internet

Online adverts are promoting portable air conditioners claiming to be designed by former NASA engineers and able to cool a room in 90 seconds. The UK's Advertising Standards Agency (ASA) warns these products are often too good to be true. YouTuber Stuart Matthews tested several devices and found they were cheap fans worth only a few pounds. The adverts, often AI-generated, feature fake reviews and exaggerated claims.