The RS tuner cleaner that sprays red is Caig Deoxit and Caig Lube in one can according to someone who has been doing this for close to 40 years. I have never had a problem or suffered from residues or anything else, but you have to get the one that is cleaner and lube and is red.
The other will clean but without the lube the graphite or what ever it is inside the pots will dry out.
If you know you will be getting a cleaner and lube soon you can use a small amount of WD-40 to get you through till you get your cleaner in.
Caig DeOxit is a great cleaner but you have to have the lube spray as well or the pots will dry out and can end up worse than before as then cleaning and lubing will not fix the problem. The coating that creates the resistance can rub off if it is dried out.
A can of Caig lube will last through up to 6 cans of DeOxit, but to get it done quick the RS spray is fine, but it is wastefull.
Not all stores carry the red spray so make sure before buying.