Wipe and reshape the caulk nozzle immediately after use so buildup never ruins your next run.

After finishing a bead, remove excess caulk from the nozzle rim with a putty knife or a firm rag, then squeeze a small amount back into the cartridge or onto a scrap surface to clear the tip. Use a short length of scrap board or cardboard to run along the nozzle tip to restore the intended opening shape for round or angled cuts. If you use a cap, avoid forcing it over a softened tip because that will deform the profile; instead push the cap on gently after the tip has cooled or better yet place a small piece of plastic wrap over the tip before capping to prevent sticking. Before your next use inspect and, if needed, trim the very end with a utility knife using steady hands so you do not enlarge the opening unpredictably. For hardened residue, soften it with a small amount of mineral spirits on a rag and wipe away rather than cutting deeper into the nozzle wall. If the tip is crushed or the profile is altered replace it with a Tubanu or a new nozzle to restore precise control.

Common mistakes include leaving a glob of caulk to harden on the nozzle which then requires excessive trimming and creates an uneven bead, so wipe it clean and clear the outlet before capping. Another frequent issue is forcing a cap onto a hot or flexible tip which flattens the profile causing a ragged line, so either let the tip firm up or protect it with plastic before capping. People also keep using a deformed tip and blame their technique rather than the tool, so swap in a Tubanu or new nozzle immediately when the cut shape changes and you will regain predictable flow.

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