In order to improve performance, CommonSpot maintains several files on the server disk drives that contain variant versions of each page, ready for sending to the different browser types. Whenever a page is modified, those cache files must be erased, and then re-created. At times, the automatic clearing fails; one-page-at-a-time clearing is possible, but for large sites is laborious. Instead, you can clear the cache for a whole subsite:
Login and navigate to any page in the subsite; click on the pencil at the upper-right; select "View Page in CommonSpot."
Click on the Admin button in the full-width navigation bar; select "Subsite Administration..."; choose the subsite; click on the "Next" button at the lower-right.
Click on the orange "Clear Cache" button at the upper-right (the same color and placement as the "Preview" button when working on a page).
Click to check the box to "Include child subsites" -- or not, as appropriate.
Click the "Clear Cache" button at the lower-right.