Windows 10 21H2, CCleaner 96.0.4664.93. Cookies are not deleted in C:/Users/"USER"/appdata/local/google/chrome/userdata/default/network/cookies. I just discovered this using SuperAntiSpyware. I had over 500 cookies stored there. I made an addition to CCleaner, Options, Include to point to this file and it took care of it. Either this is a bug in CCleaner or a recent change in Chrome.