Dyson Pure Cool Link WiFi-Enabled Air Purifier + Fan

The fan worked flawlessly until it was almost a year old. Now it will sporadically shut itself completely down. Also, it will occasionally drop off of wifi. I have to turn the fan off and back on to force it to reconnect. It's in a room with all my other electronics including my router. All my other products and devices have no issue staying connected to my wifi. Alarmingly, it will occasionally sound like its internal blades on the motor are either hitting something, or grinding against something. This disturbing noise only lasts a few seconds before the machine sounds normal again. Also, sometime about halfway into owning it, the filter life in the app decided to automatically reset itself, so now I have no clue when to replace the filter. This product would have been a nice fan if it weren't for the above issues. However, it's not a great air purifier. I am a chronic allergy sufferer, and I didn't notice any difference in air quality when I bought the machine. I can leave the machine running on high for weeks, and then I can turn it off for weeks. There's no difference in my allergy symptoms either way, and no noticeable difference in air quality. If I had to do it all over again, I would buy from a more trusted air purifier company. This one was a flop.