Dear all
Below is my project experiment. This is what I have learned from my mother in those days when she use this method to clean the gold bracelet.
So for those who dare to try I do not hold any responsibility to your watch, you have to practice your own judgment before you try this.
Based on my little knowledge about chemistry in the secondary school I don't think the Clorox which is alkaline based would bleach the stainless steel. Nevertheless when I try this I am ready to lose the bracelet.
This is the cup cut into a suitable size

Then pour the Clorox in and drop the braclet in

4 hours later

All the grime and those yaki stuff came out
Next to change the Clorox and wait for another 4 hours, this in the result after the 2nd 4 hours

Finally rinse it with water and wipe dry

This is the best I can clean the inside grime. I used a soft brush to clean the surface again before the drying session.
Hope you all can benefit from this project experiment.
