Spiders usually enter homes through open or poorly sealed doors and windows. Most of the time, spiders leave their nests to look for prey or someplace to hide. If you find spiders in your home, the first step is to remove any conditions favorable to spiders such as clutter or trash in the yard. There are plenty of store-bought products that can help remove spider webs and hopefully drive spiders away. If a little clean-up doesn’t help, your next step is insecticides. Store-bought spray treatments can be helpful on a small scale, however if you have a lot of spiders in or around your home, you may need to call a professional to handle your spider extermination in Las Vegas.