In Spider-Man: Homecoming
at the beginning of his fight with Vulture on the boat
he discharges his empty web canisters and reloads them. When they pop out he doesn't bother picking them up (litter bug!). I don't know how easy/expensive they are to make, but they don't weigh very much, and given their size they don't take up a lot of space, so it would seem to behoove him to recycle if nothing else than to save time making more.
So does Spider-Man ever save/collect his web cartridges after they're spent?
Note that I am not asking about Homecoming or the MCU specifically. The movie is only an example.