the free method:
one plastic grocery bag with no tiny holes in it
fruit and vege skins and waste (smelly stuff good)
Put fruit in bag and set bag wide open on table or floor
Every 30 minutes sneak up to the bag and seal it by the neck with your hand leaving air in bag like a balloon.
Squish the fleas with fingers from outside of bag, which remains clean and dry, letting air out of neck slowly as you do so.
Reopen bag fully wide and repeat multiple times.
The number of fleas you catch will go down about 30% each time for instant feedback on effectiveness of your efforts.