I have 2 X50s that I've had for a couple of years and they were brilliant for over 18 months... but lately, every morning I get up, I can only get 90mbs download and about 3mbs upload.

I normally get 960/100.

This happens on all my devices (Windows, osx and iOS) so it's not a device thing.

if I reboot the Decos, it goes back to 960/100.

if I connect to my main routers wifi it's at full speed too (before rebooting the Decos)... so the incoming speed is fine.

ive seen lots of other posts about similar thing happening to others... so its got to be problem with an update we received at some point as it worked fine for 18 months and nothing else has changed on my setup.

Has anyone got any suggestions on what's happening and how to stop it happening please?