1) Does the product require a new battery?
If the device hasn’t been used for several months, or if the collar is used every day, you should replace the battery (purchase a new battery from your local dealer) before contacting our After Sales Service.
Note: Remove the battery between each use for a longer life span.
2) Is the battery the correct one for the product and is it inserted correctly?
Check the battery is correctly in place and that the battery cover is closed properly (for contact with the springs)
3) Check the battery is working by blowing into the microphone:
Position the unit with the nozzle facing in the opposite direction to you, then blow into the microphone (small hole at the rear of the unit). The blowing simulates a dog’s bark.
If you can’t hear a ‘crackling’ sound:
The battery may be worn out, purchase a new Martin Sellier battery of the same type, supplied by your local dealer.
If the problem persists → Contact our After Sales Service, click here
If you can hear a ‘crackling’ but nothing comes out: the battery is working
- Have you filled the reservoir? → How can I check the level of liquid? Click here
- There may be too much air inside, in which case, you must ‘bleed’ the product: place the unit flat on a table, keep your face away from the nozzle that sprays the liquid, press on the small metal pin at the centre of the filling valve with the tip of a ballpoint pen or the refill canister. Once the air has been removed, blow again on the disc to see if the spray comes out. 
-The spray nozzle may be blocked: wipe with a damp cloth and remove any hairs or other residue that may be causing the obstruction using tweezers, BUT never insert any pointed object, such as a needle, inside the product: this will invalidate the warranty.
If the spray comes out: the battery is working. Your dog’s bark may not be triggering the spray action, this means you should adjust the sensitivity of the device.
→ Contact our After Sales Service, click here