Generally, changing a quilt is related to personal preference. If you have the conditions, you can throw it away and replace it with a new one after one year. This is certainly good, but it is not necessary for ordinary people. The quilt only needs to be comfortable and warm.
The general lifespan of cotton quilts is about 5 years; the general lifespan of wool quilts is about 7 years; the lifespan of down quilts is slightly longer, 10 years, but some people say it can be used for 20 years; silk quilts are more expensive, and the lifespan is about 10 years.
After using the quilt for a long time, smell the quilt. If there is a peculiar smell, you should pay attention. This may be because the quilt is moldy. The reason is very simple: it has been used for a long time and the frequency of drying is too little. It is caused by being in a humid state for a long time. It is recommended to replace it with a new one.
After being used for a long time, the fibers may become agglomerated or hardened. Fiber clumps are mainly caused by long-term external force on the fibers while sleeping, and knotting is mainly caused by moisture. When this kind of problem occurs, it will have a great impact on the warmth of the quilt.