BH checking

Yesterday visited my BH again to check it condition plus to do some maintenance.

1. Check the Temp and Humidity of the BH
2. Increased the humidifier cut off point to 86% from 85%
3. Check for any new bird shit spot and new bird nest
4. Check the amplifier and some tweeter working status: Replaced a faulty ext-tweeter
5. Add 2 ext-tweeter at the entrance hole to the roving area from the roof opening, add a new tweeter to other entrance hole as well.
6. Spray some Ammonia to the BH

Now the BH is with 6 bird nests and a new bird nest marking.....
I am wondering should get "Good" ext bird sound or to apply "Aroma" as to attract more bird to enter and stay at my BH!!!!!!!!!!

Which one should do first.. or have to do both?