After unplugging the power cord, I always switch the device back on with the main power switch. That should be sufficient to discharge the caps. It's never been

After unplugging the power cord, I always switch the device back on with the main power switch. That should be sufficient to discharge the caps. It's never been a problem. Other than that, I just avoid touching anything close to the power circuitry. And, finally, I've survived many 220V shocks as a kid when playing with retired washing machines and such (I don't recommend it), 110V should be less shocking. :-)