Moved house in September - first time on FTTP.
Ordered ASUS RT-AX57 from Idnet at the same time.
Once it had all settled in I was getting 100 down and 20 up (in round numbers)
Some of my machines can work with 5 Ghz, some are dual and some only 2.4 Ghz.
It has now reached the stage where I have to hard reboot the router about once a week to keep the speed up above 45 for download. My old Billion 8800 on ADSL ran for months without needing a soft restart.
The slowdown is always accompanied by connection problems to various sites.
Firmware is on auto update.
Any ideas on where to start looking for what may be causing this please?
Try performing a hard reset.
https://www.asus.com/support/faq/1039078/
(Expand the model list to confirm that this is the correct method for your device.)
Before resetting make a note of all your personal settings.
Then completely reconfigure the device manually.
Do not export/import your existing configuration, you may end up re-importing the original problem.
Anyhoo, I have swapped the 2.4 Ghz to Channel 11 as that is marginally less crowded in the immediate area according to LinSSID
I use dedicated WiFi APs rather than using a router with WiFi attached.
For up to 100Mbps, I've been using GL-iNet GL-SFT1200 travel routers set to be dedicated WiFi APs. If you're lucky you can get them for under £30 each. They're currently £33 on Amazon.
Switching to Channel 11 seems to have resolved the issue - I guess it was just getting swamped.
Nowadays there are only three useful channels on 2.4GHz: 1, 6 and 11.
If you have a smartphone you can get a WiFi scanner app which can show the locally used channels and the relative strengths of the signals on those channels.
Even 5GHz is getting crowded in some places.