What is the brand model and age of your dryer?
Also, is it gas or electric?
If it happens to be a gas dryer, and you’ve done any painting or cleaning in your house clothing that is dried in the dryer when there’s a background odor in the house will have a very strange smell charcoal, lighter fluid is a good description in fact, even electric dryers, will leave a smell in your clothing if there’s any different background odor in the house.
If it’s an electric dryer, there’s no cause of concern. If it’s a gas dryer and you haven’t used any cleaners or paint or anything in the house and it continues for multiple loads over a few weeks. You might have the dryer checked by a service technician.
John .