Have you ever gone into a mosque and you are waiting for prayer to start . You gaze upon clothes of person next to you. He is wearing clothes that were probably last washed a month ago.
You think prostating to the Almighty Creator you would want to wear reasonably clean set of clober. The clothes are Pak only when they are clean. Prayer brings peace and calm to our heart. Having a clean and Paak set of clothes bring you even more closer to the Almighty.
I urge brothers to keep everything around us clean, our clothes. our houses our streets our towns and cities. All of these acts will earn us Sawab from Allah and his people.