In reply to Rog Wilko:
There are some academic studies on the subject which deter the use of chemicals
See below extract from www.ilads.org
HOW TO REMOVE AN ATTACHED TICK
Using a tweezer (not fingers!), grasp the tick as close to the skin as possible and pull straight out. Then apply an antiseptic. Do not try to irritate them with heat or chemicals, or grasp them by the body, as this may cause the tick to inject more germs into your skin. Tape the tick to a card and record the date and location of the bite. Remember, the sooner the tick is removed, the less likely an infection will result.