Crispy sweet potato (yam) fries in a deep fryer? I bought a roto deep fryer recently. But everytime I make yam fries, they end up being soggy. 

My process: I cut the sweet potato fries to about 1/4 inch. I follow deep fryer instructions of preheating to 370'F before dropping the basket. From there, I fry a full basket for about 12-14 minutes.

The yam fries always come out soggy.

Any suggestions to improve the process?
I would also cut down on the "Full Basket" to lessen the Oil Temp Recovery. Try just a few handfuls at a time to keep the temp above 325'F. Frying time per batch should only be between 1 - 2 minutes.