Daddy long legs, also known as harvestmen, are not harmful to humans. They are also not technically spiders. Daddy long legs are in the same class as spiders (Arachnida) but are a different order (Phalangida). Daddy long legs do not have two segmented body parts, which is required to be considered a true spider. Instead, they are arthopods. Just because these arthropods are harmless doesn't mean they aren't invaders or nuisances.
Vacuum up any daddy long legs you can find. Make sure to check in tight spaces, including behind the stove, under the kitchen sink and in between the wall and the couch. Suck up any webs or egg sacs you come across.
Empty your bagless vacuum outdoors immediately. This ensures that any critters that make their way out of the canister won't simply spin new webs or lay more eggs inside your home.
Remove vacuum cleaner bags immediately as well. Seal these bags and deposit them in an outdoor garbage receptacle.
Clean up piles of old newspapers or magazines, and keep any children's toys or boxes well-organised. Daddy long legs will make their homes in cluttered messes.
Replace tattered or torn window and door screens. This is a convenient entry point for daddy long legs.
Seal any cracks or crevices in your home's foundation with caulk. This can help stop an infestation before it starts.
Lay out sticky traps that are meant to capture mice and cockroaches. These traps will catch daddy long legs, especially around baseboards. After a trap is full, throw it in the garbage.
Change your exterior lighting. Daddy long legs are attracted to bright outdoor lighting. Replace normal outdoor bulbs with sodium vapour bulbs or amber lights. Yellow lighting may also help keep them away.
Consult an exterminator if your infestation is severe.