Lactose in priming carmel cream ale

[BMWMK2]

Im making cheeses carmel cream ale, i about to add the lactose and vanilla extract to the kegging, my question is do i boil water and disolve the lactose in that or just use warm enough water to disole the lactose?

 

[Suthrncomfrt1884]

Definately boil it and bring it back down.