Security cameras losing connectivity

Need help with security cameras intermittently going out. They are mostly Axis brand cameras connected to either cisco 2960x's and alcatel P-6850E. Both have POE capabilities. My first thought is lack of power on the 2960s--too many cameras connected to one switch that's pulling too much power. I've separated them into 3 separate switches. There are no special configs on the ports. The 'fix' has always been restarting the problem switch which is getting old since we operate on different campuses

Are there any best practice settings/configs/etc that i'm missing out here? TIA