Keep it on the tick for at least 20 seconds. The tick will cease biting, back out, and will remain stuck to the cotton ball when it’s pulled away. If the tick has been embedded for awhile, keep it in a jar so you can test it for Lyme disease.

http://www.buzzfeed.com/peggy/camping-hacks-you-must-try-this-summer?sub=3148576_2754041