SI ran my 2% agarose gel on constant voltage (100 V). For a few times it worked at CV but, after a week or so the machine would automatically switch to constant current by itself. And this only happens when I try to increase the voltage to 100 V. It works fine between 50-80 V. Beyond 80 V it keeps fluctuating between CV and CC.
Is there a problem in my power supply (GENEI electrophoresis power supply) or is the TE buffer that I am using? Although I checked its pH and it's fine.