Laundry pods offer an easy and mess-free laundry solution but sometimes fail to dissolve fully, causing residue on clothes and machines. The main reasons include incorrect pod placement, low water temperature, machine overload, improper storage, and using too many pods. Other factors like wash cycle length, water hardness, and machine condition also affect pod performance. Placing the pod directly in the drum before clothes, using warm water, loading the machine properly, and storing pods correctly can solve these issues and ensure a clean, residue-free wash every time.