Different folks want to clear their cookies for different reasons. The paranoia-prone like to remove them because of perceived privacy issues. Developers need to remove them in order to fully test some applications. Others need to clear them in order to erase all evidence of their, um, browsing history. Regardless, clearing the cookies in your iPhone’s Safari is easy.
To clear your Safari browser cookies, tap on the Settings icon in the home screen. From here, scroll the screen down until you find the Safari option and tap on it.
Within the Safari settings screen which slides over, look toward the bottom for the Clear Cookies button and tap it. A little window will pop up asking you to confirm the action. To clear your cookies, tap on the button that says Clear Cookies. Otherwise, tap the Cancel button to keep your cookies.