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(Posting here because there is no Smart Switch Forum)

I have:

5 Smart Switches
4 Smart Bulbs
1 Smart Plug

Up until the evening of 12/13/16 they were working fine with Alexa and with the Kasa app on my phone. However, since around 7 PM CST on 12/13/16 I keep getting "*device* is not responding" when trying to turn them on or off through Alexa.

I've already done the following:

"Forgotten" all devices and re-discovered through Alexa app.
Disabled Kasa skill, "forgotten" all devices, re-enabled Kasa skill, re-linked account, and re-discovered all devices through Alexa app.
Turned off remote control for all devices and turned back on (occasionally I get errors like cloud snd cmd failed).

All of these worked to a limited extent - by that I mean I was able to turn on one device (random) once. I could not turn it back off. I had the most luck with disabling remote control and re-enabling, but even that does not really work. The problem is on the TP-Link side - all of my other smart devices work fine with Alexa. I've tried contacting support, but they haven't responded. I am getting very frustrated because the Alexa integration is a BIG part of why I bought all of this stuff.

Anyone have any suggestions for something else to try?