How can I keep lizards away from my room? I live in a hostel and I do not want to kill them. Is there a drug that can just repel them?
Get a cat
Get them jobs
I've heard they tend to enjoy selling insurance.
Mothballs seem to be a popular recommendation.
Garlic: Not just for Dracula anymore.
Ever since Twilight, garlic has lost popularity as a vampire deterrent. Give it new life as a lizard repellent.
They keep my boss away, maybe they'll keep lizards away too.
Call Captain Kirk
Depending on the layout of your living space, introducing a Teflon-coated vertical/overhanging barrier may hinder their approach.
Wikipedia does not list any repellants for the Gecko infraorder, but you may be able to find more information if you can identify the species.