Ditto. The not being able to delete a smart plug is very weird. The detection of a smart plug seems really well done, but not the removal. I had put the washer on a 110, but then realized the Sense had already detected it, so I moved my dryer to it. But even though I factory reset the 110, Sense still shows its old name.
[Correction] It took a little time, couple hours maybe, but the “TP-Link name” which you cannot manually change in Sense, did update to the new name. The old usage stats are still in there, but thankfully it’s only two washes of laundry before I moved it to the dryer. Hopefully those two cycles won’t screw up dryer detection going forward.