Your dog is excessively barking. You need an anti-bark collar to match your dog's drive/motivation to bark. Simple as that.
Now, consider a dog is wearing a citronella collar but is emptying the fluid reservoir daily and still barking. We can safely say that the citronella spray collar is not getting above their drive level - this is why the barking continues. The drive to bark is higher than the deterrent. Some dogs, particularly what I consider 'working breed dogs', generally have stronger drives than many 'pet breed dogs'.
A clear comparison could be a Cattle Dog and a Maltese for example. Many Maltese owners would probably say a spray collar works great. I also know many Cattle Dog owners would say they are not worth the packet they come in. Now, before all the owners of those type of breeds dispute that statement, I know there are exceptions to the rule. However, from experience, it is a reasonably accurate assessment.
While citronella spray collars can be a suitable bark control option for timid/sensitive dogs, puppies, and senior dogs, there are some things to consider about spray collars if you have a pet breed dog or working breed dog.
Firstly, some dogs aren’t phased about the spray in the face or the scent of citronella. We even get people who said their dog liked the citronella. Secondly, you can't change the level of correction/spray. Lastly, citronella spray collars have an ongoing cost of consumables - citronella refills and batteries.
Static collars, on the other hand, all have multiple levels that either auto adjusts or can be manually adjusted. This means the levels on static electric collars can be increased to match the drive level of your dog.
Generally speaking, static electric bark collars are the most reliable bark control option for pet breed dogs and working breed dogs from 6 months of age. The reason static electric collars have such a high success rate is because they're an effective form of distracting your dog from nuisance barking. Unlike citronella spray collars that only have one level of spray, the static electric collars can be matched to your dog's drive.
I find it quite amusing sometimes to read other websites where statements are made claiming that citronella bark collars are better than static electric bark collars. You know the ones, “scientifically proven to be the most effective bark deterrent…’ or ‘Studies have shown that citronella collars are 40% more effective than shock collars!” etc etc. Now don’t get me wrong, spray collars have their place. They can be a very effective anti-bark measure for some dogs. However to make all these unreferenced statements stating they are the best or better than static electric collars is complete nonsense.
The most reliable reviews about the collars are from our customers. Weekly, we would speak to several dog owners who have tried spray bark collars and need to upgrade. Static bark collars on the other hand, are nearly fool proof providing the collar is fitted properly and you have the right model to suit your dog. The rate of static bark collar customers calling to say the collar is not effective is nearly zero (once we help them get it fitted properly!).
I will re-iterate here that selecting a bark collar is as much about the owner being comfortable in using it. If you’re not, that’s fine. What I have outlined here is just the plain facts from my perspective. Citronella Anti Bark Collars do have a good success rate in certain types of dogs. I just think it’s fair to have an idea of the likely success of the collar before purchasing.