Anthony,

When I finished gluing, I squeezed as much glue out of the syringe as I could. Then I filled a bottle cap with denatured alcohol and filled and evacuated the syringe multiple times, which got most of it. To get the gunk out of the tip, I used a scrap of 1/8" square balsa stick, with a slightly sharpend tip. I stuck it through the back of the syringe and twisted it to bring out the remaining glue. Then I swished more clean alcohol through it. That left it clean enough for further use.