- 1Wipe the sticker — toner dust on a printer's lid is the usual culprit.
- 2Add light, or move so your phone isn't casting a shadow on the code.
- 3Hold the phone still, about 15–20 cm away, until it focuses.
- 4If the sticker is torn or faded, ask the shop owner — they can print a fresh one from their console in seconds.
The QR code won't scan
Clean the sticker, add light, and ask the owner to reprint a damaged code.