Undoing the Mali Weave
You will need to undo the horizontal weave and take up the slack in the verticals.
Start by finding the end of the rope making the horizontal weave (sometimes wound around the drum's waist, sometimes made into a strap of sorts or sometimes it simply runs out during the weave). Follow it back to the drum and work the weave loose. You may need to 'snap' the knot back to undo it.
Work your way around the drum, undoing all the weaves until you reach the knot at the verticals.
When you're done, proceed to Tightening the Verticals