So I replaced my smoke alarms with photoelectric as advised. Now I am getting false alarms. I have high ceilings and I have to bring a ladder in from outside to get at the alarms. This is no fun coming from a sound sleep at two in the morning, as happened last night. So what do I do now? It is fine and well to talk about dust and insects and whatever, but that does not solve my problem and the alarms have only recently been placed. I never had this issue with the ionisation alarms, one of which saved me from an electrical fire. I am going to put them back unless anyone can offer another solution. It is ridiculous to tell people to use something that doesn't work correctly and I am a bit cross about that advice. The fire services need to get real.