system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does my clothes dryer’s lint catcher get so full, yet my clothes don’t fall apart? Where does all this lint come from?
gpt
As you wash items, they lose particles (lint) which is collected in your lint trap. If you weigh the lint you’ll see that it is a small percentage of the (dry) washed items. 

As an interesting aside - laundry and linen companies (e.g., Aramark) often have a weight cut off for when they inject new linen. For example, if Aramark provides uniforms and the dry uniform loses 25% of its weight or more, it is retired from circulation.

Edit: Injection is a term used in laundry & linen to mean a new item is put in (“injected”) to circulation. When an item is retired - which can be due to weight, but could be caused by any other number of issues like rips, tares, stains - they are no longer in circulation, which means they won’t be cleaned and supplies back to the client. Syringes and other injection devices are not involved in laundry injection.