1. Disconnect the battery. This will prevent the starter from accidentally engaging while you're working on it.
2. Remove the starter. The starter is typically located on the side of the engine, near the transmission. It's usually held in place by a few bolts.
3. Inspect the starter. Look for any obvious damage, such as cracks or broken wires. If you see anything that looks damaged, replace the starter.
4. Clean the starter. Use a wire brush to clean the starter's electrical contacts. You can also use a can of compressed air to blow out any dust or debris.
5. Reinstall the starter. If the starter was working properly before it got stuck, you can simply reinstall it and reconnect the battery. If the starter was not working properly before it got stuck, you may need to replace it.
6. Test the starter. Start the engine and make sure that the starter is engaging properly. If the starter is not engaging, you may need to adjust the starter's position or replace it.
If you're not comfortable working on your own car, you can always take it to a mechanic. However, this is a relatively simple repair that you can probably do yourself with a few basic tools.