Perhaps you could share what is the model of your thin client? So we can get a grasp of what we’re dealing with.

Good starting points: https://www.parkytowers.me.uk/thin/

I had good results with microwaving a bunch of beads in a microwave safe non-plastic bowl on mid-low.

It drives out the moisture, and you can see the bead colour indicators change.

But be careful, they’re hot!