Thermoelectric humidor strong plastic smell

[cryptoking13]

I have three thermoelectric humidors and they all smell of plastic. I have cleaned them with baking soda, air them out all the time but the smell is always there. I'm thinking it has something to do with the cooling system that emits that odor. Bad thing is all the cigars, after being there for months, start tasting like plastic. It is terrible. Living in an extreme hot place, I feel I need to keep my cigars cool but if its the case that the humidors ruin the cigars, I would have to go with tupperware, even if the house is at 80+ temperature. Does any one have any experience with these?