What is the clear slime that collects on the driftwood in my aquarium and how can I control it?

I have been just removing the driftwood and rinsing it off with tap water, then replacing it. 3 or 4 days later, it is back again. Does anyone have any suggestions who has had this type of problem?What is the clear slime that collects on the driftwood in my aquarium and how can I control it?
this is infusoria and algae baby fish as well as adult fishes like guppies and mollies feed on thisWhat is the clear slime that collects on the driftwood in my aquarium and how can I control it?
try boiling the wood when you do a water change