Everytime it blunts the edge worse and worse on a microscopic levelā¦ so I donāt think itās recommended more than onceā¦
You could makes get away with 2 or so if your doing them at the same timeā¦ anything else and why bother trying to reuse and dulled and dirty needle when they are cheap
Thereās a cool infographic about hospital hypdoermic needles dulling, Iāll see if I can find it
