EDIT: So, this is an issue when connecting the Switch via Ethernet to the Internet. It does *NOT* happen with WiFi. It will warm up in the dock in sleep mode when there's nothing going on at all. Meaning it will get stressed and warm up overnight. If you have it in the dock 24/7 with an ethernet adapter connected, the console will be warm 24/7. Apparently this bug was introduced in the 5.0 update, it wasn't happening before. Be careful! This could affect the battery's health. Original post: Spoiler So, yeah. This never happened to me until the last update. When my switch is chilling in the dock in sleep mode, usually when I picked it up it would be cold/at ambient temperature. But after the latest update when I pick it up while in sleep mode in the dock, it's always warm. Not HOT, but... pretty warm. Like a phone when browsing for a extended period of time on 4G without letting it rest, it's not "it bothers me" levels of hot but it's "warm". This is not after playing. For example, if the Switch has been all night sitting in the dock while already at 100% it will be warm when I pick it up in the morning. Again, this wasn't happening before. I'm certain of it. This is happening even after rebooting it a few times. This does *not* happen outside the dock, and the battery usage while in sleep mode is normal. Are you all experiencing this too? Just for the sake of giving information, I have an ethernet adapter connected to the dock. But it's been this way since almost the launch of the console and this setup has never given me any problems. In any case I'll unplug the adapter tonight and see how the console is tomorrow morning just in case.