How do I uninstall Clean Size Charts?
You can uninstall the app by clicking Delete next to the app in the App area of the Shopify Admin Area.
If you’re a paid user of the app, there will be HTML comments left within the code:
These will probably be within product.liquid, although they could be within the file that outputs the product form (which could be a snippet, depending on your theme).
These comments can be removed manually if you wish, although they will not cause any issues if they remain in the code.
If you were on the free plan, there is no code that needs manually removing.