& 0xF is a user on kosmos.social. You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.
& 0xF @halfbyte

Note to self: If you disable your heating (while opening windows) it's good practice to re-enable the heating after you've closed the windows. Otherwise you'll spend the rest of the day wondering why your flat is getting so cold. (yah, rly)