I’m guessing Hillary didn’t know squat about BleachBit.
I’m guessing she said to delete without a trace and whoever (Bryan Pagliano ?) made it so.
I use Clorox wipes all the time and I'll bet she has them around, too.
I can't think of any person I know...computer literate or not...who would think of "like with a cloth".
I'm betting that's how it was explained to her.