I've just joined Netflix today through my smart TV. We have sky also which we can watch no problem but now that we have Netflix, I don't think our BT broadband router is strong enough. Can you buy a fibre optic router alone?
What do you mean by 'not strong enough'?
You can buy a third party router if you wish, the type of broadband you have will determine the exact requirements and device you need.
When I start to watch the program on Netflix, the picture is slightly fuzzy, then program stops then starts to buffer before it eventually comes back on. Sky TV is fine to watch, no problems there.
Is your broadband speed sufficient in the first place, can you post the stats from the hub. Advanced settings > Technical Log > Information
Have you turned off Smart Setup?