There are so many variables; the general environment where you live (Mobile Alabama I would consider a very humid environment), the environment where you store your razors (in the bathroom- not recommended!, etc.), the type of steel of your razors, how often you use your razors, etc. You will hear all sorts of things on this forum how guys get by with all sorts of things and never see rust. The last thing, believe me, you ever want to see is rust on one of your razors.

There are two easy things you can control; where you store your razors and how you clean/preserve them. What works for anyone else on this forum may not necessarily work for you. I would guess that you may want to consider oiling your razors right after rinsing and drying them. To clean. I rinse and dry carefully with a towel then with a cotton square. Then put on oil with an SRD oil applicator (not really necessary but it saves some time. Don't blow into the pivot. That's the equivalent of blowing steam into your pivot. Once you get used to it it takes no time at all to both apply the oil and to take it off. If your rotation is small this may be unnecessary. I like to use leather razor rolls. After a while, they pick up some of the oil you have been using and for those rare times you forget or don't have time to oil they sort of cover for you. They also "breathe" and help pull the moisture, if any is there, from the contents and wick it out. Just like shoes do for our feet.