We may receive a commission on purchases made from links. Ads are the bane of every tech user's existence, and ironically, they're just about everywhere these days. They pop up on your phone, tablet, computer, and smart TV. Somehow, they've even made their way to your Kindle, too. You'll see these Kindle ads in two places: the lock screen and home screen. On the lock screen, the ad usually covers the entire display, doubling as a screensaver and replacing the Kindle's default wallpapers. In the Home tab, the ad is integrated into the page as you scroll through the recommendations. Kindle ads aren't typically as crazy and random as the ones you get on your other devices. Most of the time, they're just promoting Kindle Unlimited or a new book. But if you're not a fan of ads of any sort showing up on your e-reader, there's an ad-free Kindle version available for $20 more than the base model. What if you already own the ad-supported model, though?…