I dont think applying anything to a tick such as alcohol, oil vaseline or heat is such a good idea
best thing to do is remove them with a twisting motion, preferably with a tool if you have one
reasons for this are as follows
ticks can carry lymes disease, and while in the process of suffocating, or burning up (or whatever you did to the outside bit) , they "can" (and probably "will" if you think about this) release whatever is in their mouths including their own saliva
this is where the lymes disease comes in, the initial bite is not usually the cause of infection, but the infection is transmitted later . Once the tick has had its fill and releases, a bit like a pipe, if everything is flowing one way then the infection is not passed back to the host. Stop the pipe flowing and there is a backflow, hence the infection
please note not all ticks carry lymes disease, but there is a risk
hope this clears up some
there have been a few discussions on lymes disease in here including how to recognise it etc etc
http://72.36.134.230/community/search.php?searchid=23995
Tant