Fridges are tightly enclosed small spaces that will allow the odours of last night's left over Vindaloo to reach appreciable density and stay there all night.

Fridges are tightly enclosed small spaces that will allow the odours of last night's left over Vindaloo to reach appreciable density and stay there all night. Fridges often contain leftovers and high odour items, sometimes for extended periods. On an open shelf in the kitchen this is far less likely - odours dissipate and are only around for the hour or whatever that you're cooking meals.