Planned Obsolesence with Hub 4
My Hub 4 has been performing generally well, except for continually higher and higher fan noise. At -6 they are basically full speed, and for -2 they are probably 50% speed.
I am no stranger to heatsinks and fan noise/dust being a PC enthusiast who has built several PC's over the years. Therefore I thought I'd open up the hub and clean the heat sink and fans, like I have done with literally any other device that has a heatsinks and fan.
Lo and behold, 8sleep give the middle finger to the user again and make it impossible to open the hub in any way to clean without voiding the warranty. They expect you to use compressed air from the back side, through the fans, through the heatsink, which is almost fully obstructed. But they also don't state this anywhere for typical maintenance.
Even more of a middle finger is the fact there isn't even any kind of dust filter for the intake, but a guard to stop you getting to it to even clean it. It's simply unacceptable. To me this is intentional and planned obsolesence, and likely coincides with when your warranty expires.
If there was no useless guard then at least you would be able to fit a vacuum nozzle down to suck off most of the dust.
Another reason why I won't recommend them despite how well the bed does actually cool.
(Yes I appreciate how caked the heat sink is, but if I was able to clean it, it wouldn't be)