Already did all that. It's dead. It's the second HS110 that does this, so it seems more of a design flaw than a dud. I only posted to warn others that this smartplug is sensitive to brownouts.

I have the same problem. It started happenning after a brownout, which made it lose and regain power quickly ... it's now dead, doesn't switch off (though it does click when powering on/off, so the...