The length of time you can leave clothes in the dryer after they have finished drying without them getting wrinkled can vary depending on various factors such as the fabric type, humidity levels, and the specific settings of your dryer. However, as a general guideline, it is best to remove your clothes from the dryer promptly after the cycle has ended to minimize the chances of wrinkling.
Leaving clothes sitting in the dryer for an extended period, especially when they are still warm, can lead to wrinkling as the heat and moisture trapped in the fabric can cause the fibers to settle in a wrinkled position. If you're unable to remove your clothes immediately, consider using the "wrinkle release" or "tumble" setting on your dryer, which periodically tumbles the clothes without heat to help reduce wrinkles.
If you find that your clothes have become wrinkled from being left in the dryer, you can often alleviate the problem by tossing a damp cloth or a few ice cubes into the dryer and running it on a low heat or air-only cycle for a short time. The steam created can help relax the wrinkles, making them easier to remove or reducing their appearance.
Remember, however, that it's generally best to remove clothes promptly after they are done drying to keep them looking their best and to minimize the need for additional ironing or steaming.