A slip-up like this will run its course, but to be clear, is this person is going out of her way to demoralise or mock you?

How would u define demoralise or mock out the way?

As an example, does she repeatedly bring up the incident to embarrass you in front of others?

Could you simplify your question? I tried rewording it partially but I'm not sure how to interpret your first paragraph. Is your question just about how to deal with a coworker who shared an embarassing moment? Or is it that she's still brining it up when you feel the joke has run its course?

"How do I deal with her?" - ignore the laughing until it stops.

Judging by your previous related post, you were probably unwell while you did break the kettle. Which makes it even more understandable that stuff like this happens. Explain what happened once, if that does not silence the rumors it is a case for HR.

For most people, it is probably very amusing to hear that somebody tried to boil milk in an electric kettle. Sometimes we do very stupid things, this happens to all of use. Best to swallow it and maybe start laughing about it yourself.

It is funny. You too should laugh at yourself for this, because you made a silly mistake.

"Hey, it's not like you've never broken anything before! Pot, meet kettle. Or rather, meet broken kettle... sorry about that."

Just tough it out for a week or so until someone else inevitably does something a bit stupid, and then watch everyone forget all about this kettle incident.

You tried to boil milk in a kettle. That's funny. I once tried to use coffee beans (unground) in our espresso machine. That was funny. Don't worry, we all do stuff like this from time to time.

You have nothing on the guy who ran over a laptop (we still have the pieces, even though the guy got a new job years ago) or the guy who fell over backwards in his chair (in front of witnesses).

These young gentlemen tried to make "hot lager" in an electric kettle. The laughed at themselves and their miserable failure and created a (moderately) viral youtube video. Warning: some NSFW language

Your kettle incidents were both listed in the hot network questions for all stack exchange sites, and you work with other sofware developers. Beign these such specific events, I believe the chances for someone to identify you (the colleage using this profile) are not small now. I would try to use a bit of common sense to solve/survive these little experiences, that way you don't expose all the things you already exposed about your workplace here.

I once opened the tin of tea bags, put one bag in my cup, and proceeded to pour the water into the tin of tea bags.

Humor!!! Laugh about it too! "Ya I really thought it was fine, you know I routinely boil gasoline in it and nothing happenz...."

Laugh it off, as a software engineer at an electronics company I've had people make various comments over the last couple of years when I'm doing electronics work ("Oh god, Robb's got a soldering iron again, everyone take cover.") Don't let it get to you, laugh along with it. If you find it is getting to you too much and you feel like it's gone past a joke and is bullying then have a quiet word with your manager along the lines of "I get people are laughing about the kettle incident but I feel like it's started to get to the point of bullying and it's starting to affect my work."

@ゼーロ that's a bad idea unless it's really necessary (e.g. mental illness) - as per the description it doesn't sound like bullying at all, and escalating to HR will just make people feel (correctly) that the OP isn't a normal member of the team who can be joked around with.

I would add however that if senior people are gossipy and encourage that sort of culture then it can be a place to move on from. I wouldn't say this isolated incident gets you anywhere close to that, though.

A lot of comments are worryingly close to "man up" and "learn to take a joke". While sometimes justified, such accusations are often themselves used a bullying tactic so care should be taken when suggesting them. More over it's not appropriate for a work environment, as such jokes are known to negatively affect people's perceptions resulting in lower performance at review and less chance of progression.

Take it on the chin.

Part of me wonders if these posts are part of an elaborate joke.

@ゼーロ - that could be an aspect of it. But, to a certain degree, if someone does something mildly foolish, then expects everyone to pretend it never happened simply because they are especially sensitive to anything they deem to be criticism, then it can be about the person's sensitivity. People are going to notice that the kettle is no longer available. Is telling people what happened really an act of deliberate humiliation, especially if it's a simple mistake that the others do not deem anything to be particularly embarrassed about? It all depends on how that information got around.

@PoloHoleSet it really depends on how people talk about it. It would be easy to avoid laying blame when talking about the kettle, and easy to avoid going into detail of what happened. It's hard to know how sensitive the questioner is, vs. how people are discussing what happened, but I prefer to assume good faith in asking about it.

@ゼーロ - agreed. It's hard to tell. That's why people are asking for more detail. Sounds like something, potentially, pretty trivial, but bullies love to take the trivial and use it as a club.

@PoloHoleSet Keeping in mind that the OP posted about originally breaking the kettle and then having people laugh about it only about an hour apart, I don't think we can really conclude that the office will hold this against the OP forever...

@user3067860 - No disagreement here, at all. Just keeping all possibilities open, particularly not do pile on OP.