the dishwasher with pretty good success.
I got the idea from TCS/Huxley. They had a machine at a gaming expo that was basically a dishwasher for racks of chips.
The next day I showed up with a ton of chips

It was a pretty fancy machine that could count in and count out chips by denom for a casino (had the same technology as the roulette auto-sort machines) but Im not sure they got any takers with the £30,000 ($50,000) price tag.
I don't think it was something they had developed themselves - I think they inherited it when they bought Dolphin. No-one there seemed to know how to operate it which was good for me as I got them to keep reloading it with samples