G.B.
They are not going to stop until their brains wake them up and tell them to go to the bathroom. Go buy some pull ups and make it easier on yourself. There is nothing you can do to turn this action on in their brain. it just happens.
If you search the questions for this topic you'll see page after page of the same question. The answers are all the same. The alarms only wake every person in the house up and the child still wets the bed, the restricting of fluids only makes the child dehydrated and thirsty during the night and can make constipation worse. Constipation is a common cause of bed-wetting after staying dry because all the pooh presses on the insides when they relax and lay down.
It all depends on how much more you want your laundry to run up your bills for extra loads of bedding each and every day. How much time are you willing to put in every day doing pee pee sheets and blankets. How much more the elec, water, gas, laundry soap, fabric softener,etc... you are willing to buy.