How to lessen the shock of a dog shock collar?

I ordered two remote control shock collars to help train my dog. They are a 25lb corgi and a 40lb beagle. I shocked myself with it to test and it was a bit strong, and when I’ve had to shock the beagle she jumps and cries so I am really afraid to shock the corgi. I cant afford a new set of collars, is there anything I can put on the prongs to make them feel the shock less? It came with plastic covers for the shockers and those are on, but maybe some sort of tape or fabric I can put over?? Any ideas? Thanks.
I have taken both dogs into obedience training and talked to several trainers. None of them have been able to solve the barking issues.

Get your money back on the collars and hire a dog trainer. Your dogs will be happier and they’ll be much better trained.

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Remote Collar Training for Pet Owners DVD $40.00 This DVD is 2 hours 45 minutes and teaches pet owners how to safely and effectively train their dogs with low level stimulation from a remote trainer. The video is not brand specific. In other words, it does not matter what brand or model of electric collar you own. I will show you how to determine the level of stimulation fits your dogs temperament with the collar that you have chosen to train …

Training Your Pet with the Electric Collar – The Soft Collar Method for All Breeds $89.00 This Dog Training video shows how to teach your dog the 3 most important commands and be in control: SIT, HERE, NO. To accomplish this Bill will teach you how to use the electric collar, using his “Soft Collar” method = an electronic signal between you and your dog. Consecutive training sessions are with a yr old 1/2 Jack Russell. “Tilly” has never been worked before the camera started shooti…

BarkStop Bark Control Collar $23.00 Teach your dog to stop barking with a BarkStop bark control collar. When the dog barks, a high frequency sound and shock tell the dog not to do it again. Sound and shock levels increase gradually as barking continues. Water resistant, safe and effective. Adjustable strap comes with bark control collar. Voice recognition features minimizes false triggering. Perfect for dogs 4.4 to 132.3lbs. Powered…

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998C Electric Shock Vibrate Remote Control Dog Training Collar Size: Approx. 125 x 45 x 25mm ( remote control ), Approx. 70 x 40 x 35mm ( receiver ) Product parameters: 1. Work modes: shock, vibration, buzzer, flash 2. Vibration series: 100 Level, static series: 100 Level, control through the up&down button 3. Remote distance: 250m 4. Waterproof and shockproof 5. 2 kind of metal probes, long one is 14mm, short one is 10mm. 6. Strong static impulse can penetra…

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