makisha

in past few days was parked outside on freezing nights under ice and snow and yesterday my key stop locking or unlocking car,i change batteries and it start working but only when i stand next to driver window,there is no locking unlocking from distance like it use to,another problem is that key died again so i unlock my car with metal key and sometimes it set off alarm sometimes it doesnt,i tried spare key same problem,today he start working again but died sonn,what might be a problem please help