And it's all public and you're now on a list.
Pennywise
I approve this message.
You wouldn't know evil if it was staring you right in the face, multiplexer. :)
Adam Sandler
What time should I expect you? I need time to get the spit roaster ready.
A communal bathtub in every neighborhood. You know exactly why we can't have this. Because Dave would fill them with pudding.
It's specifically only for top-level replies, fwiw. And you can see what you're following under Activity Alerts.
If you want notifications for other people's comments (not top-level) they have bells for that per-comment.
There is no fixing a broken cylinder like that unless you're an expert and you know what you're doing. Please don't attempt to disassemble, puncture, drill, or cut the gas-cylinder itself.
The best way would be to get yourself a proper gas-cylinder removal tool, and watch some YouTube on how to use it and replace the gas-cylinder entirely.
I would suggest you just buy one replacement (you're going to have to take it apart and see what you need) and then if everything works out then you can buy more.
The bell icon near the ... Menu. There's also bookmark in the ... Menu.

To access bookmarks try the cheeseburger menu top right.. tap your name and you should find bookmarks there.
Your instance may vary.
What a beautiful kitty. Tell Georgie hello for me.
Cut the top off and mount a proper turbine fit for purpose.