The answer to 'how to repair skylight' is to first inspect the skylight for any cracks, leaks, or other damage. If the damage is minor, you may be able to repair it yourself. Start by cleaning the skylight and the surrounding area thoroughly. Then, apply a sealant or caulk to any cracks or gaps. For larger repairs, you may need to replace the skylight glass or the entire skylight unit.
If the damage is more extensive or you are unsure of how to proceed, it's best to call a professional roofing contractor. They can assess the extent of the damage and provide the necessary repairs to ensure your skylight is functioning properly and preventing any leaks or water damage.