How can I get sticky tape residue off my body?

I just had a baby via c-section and I had band aid and heavy duty medical tape all over my body. i.e.- tape on my leg to keep catheter inside,tape on my wrist for the IV fluids, and band aid on my other wrist and inner elbow from taking my blood. I've taken all the tape and band aids off but the sticky outer lines shaping the place they put the tape will not o away. I've tried the past 3 days in the shower to take it off with warm soap and water and trying to scrub it off,but to no avail. anyone have any ideas on how to get these stubborn black lines off my body?