Don't use olive oil.
Locally they sell these kits(and worldwide probably in some form), it's remo-wax
comes with a small syringe, DIY solution
http://www.verkkosivuapteekki.fi/WebRoot/OVA/Shops/JamsanApteekki/4E5C/CDC4/5F18/70AD/6888/0A28/1051/3D25/Remo-Wax_Pumpulla.jpg
works well especially...