The best way to prevent this is to use a composting bin without any waxed paper on top. The compost will heat up more slowly, which will cause less emissions. This isn’t always possible. Many people use waxed paper because they can put the compost in the bin after they take out the compost material. They don’t want to disturb the compost material. If you do use a composting bin with waxed paper, the best way to prevent this is to put a plastic bag over the top of the bin and then put a lid on the plastic bag. This will cause the paper to become much cooler than the air around it.
You don’t have to wait until the bin is full to put the bag on top. Just leave the bag there until the compost is done. The next way to prevent the smell is to make sure that you keep the bin clean. If you don’t, then the smell will come from the rotting compost materials. It is very important to keep the bin clean so that the materials can break down properly.