We recommend that you use the glue 6-8 weeks after purchasing and opening the bottle. The fresher the glue, the better the results. Always keep the glue upright in the designated area glue container, in a cool place. Shake the glue well before use (about 2 minutes) and shake before each drip. If you have high humidity and temperature in the room, at least 4 clients a day, this means that you open the glue often. In this case, replace the bottle of glue with a new one every 3-4 weeks. Before shaking the glue, remove the cap and install the dropper, plug it and then shake. This will prevent the glue from spilling into the cap.