I'm sorry to hear that your leather dress went through the wash and dryer. Leather is a delicate material and can be easily damaged by water and heat. Unfortunately, if the leather has shrunk or become distorted after going through the wash and dryer, it can be challenging to restore it completely to its original condition. However, you can try the following steps to see if there's any improvement:
Gently dampen the leather: Moisten a clean cloth with lukewarm water and gently dampen the leather. Avoid soaking it or using excessive water, as this can further damage the material.
Stretch the leather: While the leather is still damp, try to stretch it back to its original shape. You can do this by pulling gently on the affected areas, but be careful not to apply too much force or you may tear the leather.
Allow it to air dry: Lay the dress flat on a clean, dry towel or hang it in a well-ventilated area away from direct sunlight or heat sources. Let it air dry naturally, and avoid using a hairdryer or any other artificial heat source, as this can cause further damage.
Use leather conditioner: Once the dress is completely dry, apply a leather conditioner to help soften the material and restore some of its flexibility. Follow the instructions on the conditioner bottle and apply it evenly to the entire dress. This may help to make the leather more pliable and improve its appearance.
Keep in mind that these steps may not completely restore the dress to its original condition, especially if the damage is severe. If you're still unsatisfied with the results or if the dress is valuable or sentimental, it's best to consult a professional leather cleaner or tailor who specializes in leather garments. They may have more specialized techniques or tools to address the issue.