How do you clean warangka interior?

[A. G. Maisey]

Here's pics of the tools to work inside a wrongko.

The segrek cuts on the draw stroke, I forged this one out of a car coil spring.

The knife is designed to get inside the top of the wrongko, I forged this from an old chisel.

The copper tube is pinched together at the end to increase [pressure of air blown through it