Using the Klein Tools VDV205-044 Crimp Die Set is straightforward. First, make sure you have Klein's VDV200-010 Insulated Terminals (sold separately). Then, select the appropriate die set according to the wire size. Insert the wire and terminal into the die set and apply pressure to make a secure crimp. When it comes to maintenance, keep the die set clean and dry. After use, wipe it with a clean cloth. Avoid exposing it to extreme temperatures or harsh chemicals. If you notice any damage or issues, Klein offers a lifetime warranty on material defects and workmanship, so you can contact them for support.