It must be annoying for New York City workers to constantly have to clean spider webs off buildings in the Marvel universe.

Pretty sure the webs are formulated to dissolve in a couple hours.

Yes, this is well established in the comics and animated series. It's actually one way Spider-Man proves Mysterio is impersonating him. The fake Spider-Man's webs don't dissolve on their own.
- And the MCU. First solo movie spidey says it will disolve in a couple hours when he leaves Glover stuck to his car.
- And the newer movies with the dude who had ice-cream in his groceries.
- Maybe you can answer this for me, but I always thought that his ability to shoot webs came from being bit? How can he reformulate his own webs if it's coming from his body? Is that addressed in canon? I never got real deep into comics, this was just a thought that I had while I was watching Spider-Man: Far From Home today.
I wonder if they catch a bug or two before they do though? That would be cool:-).
Hmm now someone needs to mop up the gooey white spiderslime
- Unless it's formulated to sublimate into a gas I suppose.

Annoying? Quite the opposite. Forget the self dissolving property of the web and assume it's there forever. Now you got a material that is extremely light and extremely strong and flexible. Companies are going to pay to collect them. It's gonna be like ambergris, but exclusive to one city. People would flock to collect Spider-Man web. I wouldn't be surprised if Spider-Man web is outlawed by the government and becomes even more valuable.

In the comics he tries to sell the compound and no one wants it iirc due to its lifespan. Stupid but at least it's brought up
Parker could simply quit his job as a freelance photographer and sell the formula to his own web shit, because he made them himself and aren't part of his super powers.
- As a superior raimi fan, I have no idea what you're talking about.
- This is literally the very first thing he tries to do in the comics before he becomes Spider-Man and it doesn't work because the people he reached out for thought it was too short-lived.
  
  But also, needing to juggle real life responsibilities like having a job is one of the main appeals of Spider-Man as compared to, say, the Avengers.
GET ME SPIDERMAN

-J.J.J in some universe

According to the comics, webbing dissolves and fades away after a day.

Is that accurate? I haven't kept up with comics in a long time, but when I sort of did, it was said to be an hour rather than a day. (I always assumed this was so you wouldn't worry about people being trapped for 24 hours or however long.)

Not trying to be argumentative or anything, just curious if the lore changed, or maybe I misremembered.
- It could have been an hour, it was first mentioned in the earliest comics that the webbing fades away, and I’m not sure what they said more recently.

Bruh I hate to break it to you, but they already have to do that. I took this photo on the 66th floor of the Sears tower this last summer. Note that the spider is on the outside of the window.

He’s just chilling between fighting crime.
Damn, look at that little guy go!
- Can he swing from a web?
  
  I mean, probably.
- Spiders usually do it in reverse. They tether themselves to what they are on then "let go" and let the wind take them, with their tether being a lifeline so they don't go too fast and in case they don't get anywhere, then they can just go back to where they came from.

They can just leave ‘em up there until the next time New York is destroyed.

Autoclean

thoughts from the shower of one J. Jonah Jameson

Like someone else already mentioned, spidey's webs are formulated to break down over time. Iirc, he has changed the formula to change how long that is, for special circumstances, but it's usually described as "a couple of hours".

I don't recall any canon description of a hard limit to the timing, up or down, either. So it could be adjustable down to near instant to practically forever.

However, there is also web solvent mentioned a few times over the years, though no description of it beyond that comes to memory.

Now, afaik, the formula isn't even really described as to exactly what it is. I vaguely recall one of the older issues mentioning it being like silk, and a much later generic "polymer" being used, but nothing was elaborated on in any of the issues I've read that I recall. I have read everything up to maybe ten years ago or so at least once. That's when I discovered certain sites and programs that allow one access to digital copies for free, and spidey was the first character I binged like that, him being the first superhero I ever cared about (enough to have worn out a dozen sets of spidey underroos before 2nd grade).

Anyway, can you imagine how annoying it would be if it didn't dissolve on its own? There's been a few scenes where people bitch about the webbing as it is lol. A bunch of grumpy New Yorkers having to wait for city services to come along and deweb a sidewalk? Holy crap ::

I don’t recall any canon description of a hard limit to the timing

One comic I had mentioned exactly one hour, to the second. Spidey was proud of that fact.
- Definitely gives a different perspective to when spider leaves the bad guys hanging around off a tall building, much darker. I can hear Venom laughing right now