Salty, Smudgy, Sunglasses

[Blue_Runner]

Hey fellas, when you are on the boat and you take a shot of salt to your sunglasses how do you clean them?

It seems I can't alway find a soft dry rag or tee-shirt and even if I do have that it can't be good to wipe saltwater on the lenses. I thought about getting 2 spray bottles - 1 with tap water and a little bit of dish detergent, the other with straight tap water to clean them up while on the boat.

Anybody have any good ideas on how to handle this problem?