Sorry for the long read but any advice would be gratefully received.
I have been hindering the normal progress of 3 / 4 hives for the last 5ish years. I have noticed that at the end of the summer I get them ready to over winter and the colonies are calm and gentle. Open them up in spring. The colony with the 3 yr old Queen is grumpy at best. The other 2 colonies who had 1 to 2 yr old queens both are still calm. This has happened for the last 3 seasons that I have noticed, some have remained a nervous colony until I / they have requeened and they calm down. Is this normal, is it likely to be something I'm doing? Do they get grumpier the older the Queen gets?
I went in today and 2 were so gentle, the other one with the older Queen, as soon as I went below the Queen excluder I was covered in bees. Now granted it was very overcast but the air was full, my arms and veil were covered. I had to keep walking away and wait for them to calm a little. I didnt go through that hive today. Last week they were just grumpy, but went through, lots of stores, good laying pattern / brood healthy, Queen seen - looked ok. Plenty of space - on brood and a half with a couple of supers above the qe. Need to point out that this colony last year were so gentle and calm.
Does the smoker fuel that I use make any difference? I currently use wood chippings that I get from a saw mill nearby. I am thinking of burning pine cones as there are hundreds near to the apiary. Could the type of wood im burning be making them angry? I dont often smoke the other two hives as they dont need it, and try not to use too much on the other, but not smoking doesn't work and smoking just seems to P them off.
Should I be requeening for often?
Thanks