Rather than trying to sift through the oil with a fork or a mesh ladle, or even pouring it through coffee filters, try using some unflavored gelatin and water. Let the used oil cool to room temperature or just slightly warmer, simmer some water (about ½ cup per quart of oil you want to clean) in a pot, and stir in your gelatin (1 tsp per ½ cup of water) until it's dissolved.