LEMONGRASS is an excellent bug repellent. PURIFICATION is also excellent (it contains both lemongrass and citronella). Interestingly, I find that in Singapore Purification is better; in Bali Lemongrass is more effective.
NOTE: Some people find that the skin on the fingers used to apply Lemongrass and/or the skin on which they apply it may become slightly yellow in color. This is especially noticeable around the fingernails, so be careful when applying it repeatedly.