PETG layers not sticking on layers with high infill

I have a part I'm printing with Overture PETG (printed from a drybox) and I'm having an issue where whenever I'm at a layer with a high solid infill the perimeters just completely fail. I think the main issue with this is that, since a large portion of that infill is considered bridge infill, its moving really slowly (i decreased bridge accel and speed by a lot to improve bridging, which worked), these layers are taking a long time and some filament is cooling too much. How can I fix this error? Perhaps increasing the print temperature? I'm currently printing at 235°C.