In April while onboard Freedom, my hair straightener was destroyed while in use. Everytime I turned it on, 30 seonds later it automatically turned off. When I managed to get it working, sparks came out of the socket and blew out my straightener. Now I'm going on the Oasis in 2 weeks, and I'm wondering if it's the sockets onboard. Don't want a repeat of what happened. Should I use an extension cord(being that they give me one for a CPAP machine)?