If these chamois aren't kept 100% clean, 100% of the time, they shouldn't be used at all. We've seen many paint finishes ruined by natural chamois scratches due to embedded, microscopic dirt and debris.
Hi-Temp's Chamois Cleaner will keep a natural or synthetic chamois clean and soft. The specialized formula also contains anti-bacterial additives to prevent odors and bacterial damage (mildew).
The cleaner can be added to a bucket of water, followed by a chamois "wringer". It's a super concentrate with 1 cap per gallon.