Since your put up the tree and dripped it in tinsel, have you noticed your internet speed slowing down? If your tree is near your WiFi router it can mess with the signal. Putting anything that big in front of your router can cause issues by blocking the signal and wreck your internet speed. The lights and decorations can make it even worse.  When the radio waves from your router hit ornaments and tinsel, they bounce off and scatter, which can slow your WiFi down. Plugging the lights and router into the same outlet also isn’t a great idea, according to experts.  Especially if the lights twinkle or flash. Having them in the same outlet raises the chances of your connection dropping out.

If any obstacle, like the tree, is blocking your line of sight to your router, it will help to move the router or the tree.