We use lock-tight screws and take every care to ensure screws remain tight. Even in spite of this, they may loosen with wear. As is the case with repairing scratches (see above), you will find guides online that offer quick fixes. We encourage you to consult a professional if your glasses need adjusting. Some materials are resistant to adjustment. Aluminium alloy, titanium, and memory plastic are all best handled by an optician. The same goes for rimless and semi-rimless style glasses. While the materials listed don't adjust with ease, the styles listed can be fragile. Either way, attempting to do so without the proper expertise is likely to result in a poor outcome. Light maintenance is possible with an appropriate screwdriver. With this, you can return any screws that have loosened to a firm tightness. You need to leave more serious adjustments to professionals. You may find guides online that suggest submerging your glasses in hot water. They may also suggest bending your glasses with your hands or tools. These processes will at worst damage your glasses and at best void your warranty. If you need your sunglasses and glasses tightened, please get in touch with our team. They will be happy to point you in the right direction. Your satisfaction with your eyewear is important to us.