I have a five years old Beko double oven electric cooker. I never had issues using the oven until we moved property two years ago. Our previous property kitchen was separate from the living room. Our existing property kitchen is part of our Type 1 open living space. There is no window in the allocated kitchen area but a circular ceiling air vent grill connected to a Titon CME1 Q Plus with Humidity Sensor TP300HA/010. Our guests and we have noticed we get itchy watery eyes and dry tickling throat when making food in the oven despite being clean.