Did you get a day time or night time iishfly? If you bought one of the night time ones, you may need to buy more of the snap in boosters. For our day time iish fly we have 3 long boosters and one of the tummy pads in it.
Have a go with your night notions under wool, it may surprise you with the magic of wool. We have a bamboo night notion, the with bamboo and hemp inserts. We also use an easy peasy hemp booster in along with the NN's own boosters.