Your residential proxy can get blocked if used too aggressively. For instance, sending too many requests to the same website from one proxy address may trigger the site's security systems to block that IP.
To avoid this problem:
Add request rate limits in your scraping tool to avoid overwhelming target websites
Always use the "Randomize IP" feature to ensure each new request uses a different IP address
These simple steps will help keep your proxies working properly and extend their useful life.