Wireless spotlight cams fogging up at night

I have a mix of wired and wireless cameras, but at night I am noticing only on wireless cameras keep fogging up. This is a shot of my camera from light night and that blob in blue is me walking by the camera. I looked my the wired flood camera and wired spotlight camera and both where very clear. I am not sure if the wired camera let off more heat to reducing moisture build up, but I am wondering what can I do with my wireless camera to reduce mosture buildup? Thanks