How to Slice Open a Dimo

I thought I was clear enough when I added subtitles to the video "How to fix dimo on the flute".

I added the line, "slice the dimo open....", but I am still getting emails from customers overseas telling me I sent them the wrong size Dimo.

I tried to explain that Dimo comes in tubes but they thought I meant I packaged the Dimo in a tube, which of course they did not receive.

A video speaks louder than words so this is what I meant by, "slice open a tube of Dimo":