CCollins54 wrote:70f. My chamber is an 8x10 walk in cooler
...and therein lies one of the problems. If you introduce air at 50%RH/70°f into a chamber at 50°f the RH will increase to 100%. That's the nature of RH.
In a smaller set up, causing the fridge motor to run will condense water out of the air and reduce RH, whether this is the case in a walk in, I don't know.
Have you noticed that the RH drops when the fridge motor is running? (or slightly after it stops?) - if so, you may be able to use this to your advantage.
HTH
Phil