You've just discovered the reason WiFi cameras ain't all that. Besides the fact most residential WiFi systems aren't terribly reliable: There's the "how to power it" question.
Personally: I gave up on Wifi cameras and installed PoE cameras everywhere.
N.B.: Dome cameras are usually contraindicated for outdoor installs or anywhere else where there's a high likelihood of airborne contamination such as heavy dust, pollen, rain, fog, etc. Problem is the that stuff sticks to the domes, seriously degrading video quality. Bullets and turrets are usually recommended for such environments. (Of those two: Turrets are generally preferred as they're less inclined to by fouled by spider webs.)
Personally: I gave up on Wifi cameras and installed PoE cameras everywhere.
N.B.: Dome cameras are usually contraindicated for outdoor installs or anywhere else where there's a high likelihood of airborne contamination such as heavy dust, pollen, rain, fog, etc. Problem is the that stuff sticks to the domes, seriously degrading video quality. Bullets and turrets are usually recommended for such environments. (Of those two: Turrets are generally preferred as they're less inclined to by fouled by spider webs.)