We very often start off with a new car and say that we are going to look after it and keep it clean. Over time this can often become a lower priority and very quickly you can start to let the dirt accumulate.
If you have children you may start to let them eat or drink in the car and find that the seats are covered with crumbs and wrappers. Even if they are in a child seat, the food still manages to find its way under and start to get into the seats of the vehicle.
In order to keep your car clean, you need to ensure that you give it a good going over at least once a week. Remove all items from the vehicle so you have a clear space to work with. Vacuum over all the seats first starting from the top and then working your way down to the floor. Remove the mats and if they are really dirty then give them a wash. Make sure that you do this on a warm day so you can get them dry again before you put them back in the car. If the seats are stained you may want to shampoo them. Be careful not to get them too wet as they will take ages to dry and leave a damp musty smell in the vehicle.