To resolve the issue of magenta color pollution when printing with your E525W printer, follow these steps:

1. Clean the printer's printhead and cartridges thoroughly.
2. Check for any obstructions or debris inside the printer that may be causing the issue.
3. Ensure that the cartridges are securely installed and properly seated.
4. Calibrate the printer to ensure accurate color alignment.
5. Consider printing a test page to see if the problem persists.

If the issue persists after following these steps, it may indicate a more serious problem with the printer's hardware or cartridges.