For Chrome:
To clear a single cookie
3 dots on top right
Settings
In Privacy and Security, Cookies and other site data
See All Cookies
Search cookies for Scoutbook
Click on trashcan next to scoutbook.scouting.org
For Chrome cache:
3 dots on top right
Settings
In Privacy and Security, click clear browsing data
click all time
click cached images and files
clear data
In Edge
There is no way to clear an individual cookie.
for Cache and all cookies
3 dots
Settings
Privacy, search and services
in Clear browsing data, click Choose what to clear
Time range – all time
Check cached images and files, and check cookies
Click clear now
Firefox
Cookie
hamburger
Options
Privacy and Security
In Cookies and Site Data, manage data
Type Scoutbook
Click on cookie to remove
Remove Selected.
Save changes
For cache
Click on the hamburger menu (three parallel lines)
Options
Privacy and Security
In Cookies and Site Data, Clear Data
Have only cache box checked
clear
For Apple Safari, see the information here.