This stuff is a big favourite of mine. Wherever I go in the world, I take small slithers in clingfilm.
For three or four days before I go into the jungle, or summers woods in the UK, I use it to wash. The day before I go out , I stop using it, because the smell is so alien in the wilderness, and would be picked up by humans and animals alike. From my experience it seems to last about five days.
This is not a medical, or scientific fact, so please remember its not guaranteed to work for you.
This weekend we have a course comming up, and ticsk ay be around, so I have been bathing in coal tar soap, by the way its not the most romantic of smells, and

Preperations have started for the wildlife tracking  course this weekend.  I am always impressed by our students, and look forward to seeing new trackers come into the fold. Every once in a while we get a natural tracker, and every course creates an identity of its own. Honestly, no two courses are ever the same and I am sure this course will , like those before them create a very special bond.

The tracking course next weekend is the one in the year where we put in long( but enjoyable) hours.
The mid-summer course specialises in bird dynamics, where Steve will get you up very early and walk to a special part of the woods, from there , he will take you through bird language and dynamics.
You will then return to camp for breakfast where we will create a sound map.