I am a regular passenger of Train no 6714 Rameshwaram Express between Vriddhachalam and Chennai. I board this train at Vriddhachalam, every Monday morning. The coaches are always dusty. I thought the Indian Railways only runs for passengers, but this train also carries rats, bed insects etc. Every time I am suffering with the same problem. I have taken up this issue with the Coach Attendant each time I travel, but, the end result is the same....