Anak Whistle - How to use rubber O rings & Teflon tapes to maintain stable sound

I am sending you extra rubber O rings in the small zipper bag as shown in the photo.

O rings are to put on the tuning slide body. They are consumable.

To maintain stable and good sound, the tuning slide should be very tight when you push in or pull out the whistle head from the body.
Use the wood toothpick to put two O rings on each bezel. Therefore you are going to use four O rings.

When O rings are damaged and consumed, I recommend you to watch the video to handle the matter quickly.

It is recommended to carry extra rubber O rings and Teflon tapes all the time.

You can easily buy Teflon tapes at the hardware store or supermarket.

Caution:
Rubber O rings can be quickly damaged and broken when exposed to the air, sunlight, and outside.
I recommend you to keep the whistle head and body connected.
And use the whistle stand to keep the whistle.