Suggestion 3: Move
Mirrors and/or Large Furniture away from your router and do not put them between your Hot Tub and your Router.

 All metallic surfaces reflect WiFi signals, including the thin metal layer found in most mirrors.

Move large furniture away from the path to your Hot Tub. Signals that don't have to travel through large, cumbersome furniture will make reception better.

Your TV is Murder for Your Wi-Fi Signal

Because network equipment is often co-located with television receivers in the home, a common temptation is to take that ugly router and shove it behind the TV where nobody will notice it so much. The trouble with that is, your TV is a double whammy for your Wi-Fi: a physical barrier of materials that weaken the signals as they try to pass, and possible signal interference from the electronics.

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https://www.wikihow.com/Improve-WiFi-Reception