Most oils spread over a tic will suffocate it, so it drops off. You just have to be patient. Olive oil for instance. Maybe some chain lubes ?
We generally use a mix of a tic lasso, which looks like a small pen with a loop on the end - you stick it over, twist, pull. plop .. or the tic "forks" which normally come in a set of three of different sizes. They're like tiny plastic crowbars. Again, under the body, twist slightly, lever. pop.
Ideally, never use tweezers or pliers as you can squish the tic, which causes it to barf into your blood stream - which obviously has negative reactions !
You can also get creative if you don't have anything like that to hand. For instance anti mosquito wall plugins with the little screw in recharge bottles - unscrew the bottle, rub the "wick" on the tic and it will die fairly quickly.