Been killing giant spiders (39) in the Stronghold of Security for a while now. The wikis say Spider Silk has a 100% drop rate but I haven't seen a single one.
Is the wiki just not updated? Sorry, I'm kinda new haha
Try spiders in a different location, like Lumbridge catacombs.
I cannot for the life of me manage to catch Covid. Perhaps it's because I didn't get vaxxed? The travails of those lacking immunity.