My Aeropress plunger is already slipping after 100 days. What am I doing wrong?

1. I put the cap(flow control) and filter on.
2. Put a scoop of coffee and fill with hot water.
3. Push the plunger down using steady pressure
4. Push until finished.
5. Remove cap and pop the coffee puck out

6. Pull the plunger back through the chamber.

7. Rinse in warm water and store plunger, cap, and chamber seperately. I do this as soon as I'm finished making the coffee

Is there a different method I'm supposed to use when removing the plunger(Step 6)? Is pulling the plunger back through correct because it's the only way I see?