The best way is to wear gloves when you work with this stuff. Really, the solvents in plastic glues are hazardous. Wear goggles, gloves, and, if in unventilated workspaces, wear a respirator. As to getting the dried stuff off your skin, soak in a tub and use warm soapy water. There are solvents you could use to dissolve the glue, but they present their own health hazards.
NtP