# Instruction Smartphone & Tablet — Zcratch > Instructions: remove smartphone & tablet display scratches with Zcratch UV. Simply apply it yourself! Quelle / Source: https://zcratch.com/en/pages/instruction-smartphone-tablet --- ## Important information before use - Always protect the Zcratch UV from UV light (sun / daylight) so that the adhesive does not harden. Repack after use! - The application video needs to be watched for a successful application! - Any standard protective glass is suitable for the application. Watch the full resolution video on YouTube: Here ## Important application tips (please read) ### Smartphone • Clean the display thoroughly to avoid dirt under the protective glass • Better use a little less than too much Zcratch UV • Let the UV lamp shine for about 2 minutes in a slightly darkened room (the UV lamp deactivates itself after 2 minutes) ### Tablet • Especially with tablets it is important to clean the display thoroughly, as crumbs are difficult to remove later • Better use a little less than too much Zcratch UV • Let the UV lamp shine for about 1–2 minutes in a slightly darkened room (the UV lamp deactivates itself after 2 minutes) ### Apple Watch Ultra 1/2/3 • Clean the display thoroughly to avoid dirt under the protective glass • Better use a little less than too much Zcratch UV • Let the UV lamp shine for about 2 minutes in a slightly darkened room (the UV lamp deactivates itself after 2 minutes) ## Solving problems ### The air borders cannot be pushed out Reason: There is too much Zcratch UV under the protective glass / an overpressure forms that cannot be compensated. Solution: • Slightly lift the protective glass up to the adhesive and spread the adhesive with the spatula while applying pressure on the glass • → this results in a thinner and more even adhesive layer ### The film pulls greasy stains after the application Reason: The device, the protector and the hands have not yet been completely cleaned from all adhesive residue. Solution: • Clean the device and the protector thoroughly with fresh handkerchiefs and rubbing alcohol • Wash your hands several times with soap ### I always have crumbs under the protective glass Reason: There are too many dust particles in the air. Solution: • Most of the dust particles can be removed afterwards with the provided “Dust Absorbers” • The bathroom is often the room least affected by dust particles ### I need more adhesive and a new protective glass • Buy more here (accessories): /en/products/accessories-for-zcratch-uv-sets • Buy more here (protective glasses): /en/products/zcratch-compatible-protective-films ## Thank you for your trust and your order ## Need help? Then contact us using the form.