Kontak seems fine, I can hear a slight difference after cleaning once a year.
Preferred Contact Cleaner and Contact Enhancer for Audio?
I have been doing some research on the topic of contact enhancers. I've used the Stabilant 22A contact enhancer. I understand other options occur in this space, such as the Furutech Nano Liquid, the Mad Scientist Audio graphene contact enhancer, and Cardas Contact Conditioner (to name a few). Any one having experience with any of these (or others not mentioned)? And what about contact cleaners? Are any contact cleaner worth considering (beyond 70% isopropyl alcohol)?