Nissan Tida : How to eliminate air noise from door sealing

This tip will reduce air noise when you drive with high speed. The budget is extremly low.
Materials :
1. Plastic tubing form aquarium shop
2. Shampoo or soap

How to do :
1. Measure the length of all robber seal of door rim. Each door is about 3.5 meters.
2. Start at the front door, insert the tube at the top corner with hole cap there. Lube the tube with shampoo or soap.
3. Carfully push it throught all length of the door.
4. Repeat to other doors.