Microsoft Edge
In Edge, click on the three ellipses in the top right corner.
From here; go to Settings > Privacy, search, and services > Clear browsing data > Choose what to clear.
Uncheck everything except for the bottom two options.
For the time range, choose All time.
Then click Clear now.
Next, from the sidebar, go to:
Reset settings > Restore settings to their default values > Reset.
iOS
Go to Settings > Safari > Advanced > Website Data > Remove All Website Data.