If you really want to hasten the molt, give them a bath. Towel dry and let them finish drying off in an area that is not drafty or too cold. I use my garage (in a cage of course)
. After the bath, give them an all purpose wormer, such as ivomec, to make sure that internal parasites are not part of the problem. I actually use a pet shampoo that is supposed to kill pretty much all the potential external parasites, such as lice. Give it a try, I think you will find that it will help. It is normal for exhibition type birds to stop laying during the molt, especially as the days get shorter and the weather colder. It\'s nature.