2005 Chevrolet Equinox electrical nightmare

I washed my car and when I started it My gauges and radio started cutting off and on. After stopping for about an hour and restarting the vehicle I lost everything including power steering...radio..odometer. .tachometer. .speedometer ..fuel and heat gauges. My abs..traction control ..maintenance. .brake..and airbag lights stay on all the time. I've had car on code scanners wt no codes showing. I've also replaced ignition switch and checked all fuses including the 80 amp main. And now out of the blue the car will kill the battery in a matter of a few hours but not all the time....Sometimes it will stay charged for days and sometimes a couple hours.