How often should I run a duplicate file scan?

I’ve been trying to keep my computer clean and organized lately, and I was wondering — how often should I run a duplicate file scan? I’ve noticed that over time, files tend to build up, especially with downloads, backups, and media files. I want to maintain optimal storage and system performance without overdoing it. Do most of you schedule scans weekly, monthly, or only when the system starts slowing down? Also, any favorite tools you recommend? I’d love to hear what works best for you in managing digital clutter.