With spring in full swing, here is a recipe to help you clean out your fireplace. This solution is good if you have a brick or stone fireplace.
Powdered pumice can be purchased at many hardware stores and nurseries. Call around, the price can vary quite a bit. Fels Naptha soap can be purchased at most grocery stores in the laundry or hand soap section.
Grate Fels Naptha soap into a bucket with hot water. Then add pumice and ammonia. Mix all ingredients well. Wear gloves and make sure you have adequate ventilation when using this solution. Scrub fireplace with this solution and then scrub with water to rinse.