Even every band in the ladder is doubled, so it is definitely a problem with the electrophoresis itself. I'm not sure why this is happening. I've tried a few different things such as different volumes of buffer in the tank. I never used to have this problem and have never actually noticed this issue in years, but I keep getting it fairly frequently and it's just ugly... Any suggestions on the cause?
I recent started using TAE, and the appearance of these doublets may be correlated with when i started using it, but i have definitely gotten clean gels when using TAE.