We do eat meat but can go long periods without or without using our cast iron pan to cook our meat in.
And I have found a method that works for me: I use a spatula to remove any large bits of food and then use a little vegetable oil and heat it up then I wipe out my cast iron pan with a paper towel. After cleaning it I will add some vegetable oil again and heat it up and wipe it down really well, allow to cool and put it away. I don't usually use water since the oil, heat, spatula and paper towels do the job.
I have tried kosher salt to clean out my cast iron pan a time or two, and I would also add some oil and heat and wipe with a paper towel or clean rag.