To win a product liability case, you must be able to prove:
You were injured or you suffered losses. If you were not injured or there was no damage, then you do not have a claim.
The product is actually defective. There may have been a flaw in the making of the item, it was designed poorly, or the company failed to provide adequate warnings or instructions.
The defect is what caused your injury or losses.
You were using the product as it was intended.