During our remodel (Man! It's already been six years ago!), the electrician added smoke-and-fire alarms throughout the house. I really liked this until recently. The entire first floor's units (six total) have started randomly beeping. I replace the batteries twice-yearly (Daylight Savings swings) so it's not that -- especially since the entire second floor are still silent unless I run a test. I can only think that each of these beeping units have gotten some dust or debris on their smoke sensors. Since the electric variety do not have replicable sensors, how do I go about "cleaning" them -- or would it be best to simply replace each unit?
Secondly, the Cupertino branch of Home Despot no longer sells First Alert units. They sell another brand (Pirex, I think). Since I'm familiar with First Alert products, I tend to shy away from alternatives. Are there other products that are comparable (both in cost and quality?)
Many thanks!
The Ranger