My niece is in The Gambia on VSO and when my sister was going out to visit her she asked her to bring Boots Insect Repellent as she found that was the best one. She's been in The Gambia for a year so she should know what works and doesn't. I personally brought it with me when we went to Egypt a couple of weeks ago and found it very effective but the mozzies found a couple of spots I missed. However, in total, I got 4 bites in a week. The hotel supplied a plug in repellent in the room with an insert and replaced the insert for every night.