MOSQUITOS LEARN TO IGNORE BUG REPELLENT AFTER SMELLING IT ONCE: Time to stock up on citronella candles for use at your summer barbeques as new research finds that the main ingredient in bug spray doesn't necessarily stop pesky mosquitos. Scientists at the London School of Hygiene and Tropical Medicine say the ingredient DEET that is widely used in bug repellents may decrease in effectiveness at repelling mosquitos over time. Resaerchers conducted research by covering a person's arm in DEET and exposing mosquitos to it in a lab. They found that at first the mosquitos were repelled, but a few hours later the same mosquitos were tested again, and the DEET was less effective. Researchers say they also placed electrodes on the mosquito's antennae and determined they were actually growing less senstivie to the chemical. The research was published in the journal PLOS ONE. (Fox News)