Other Information: Avoid exposing bottle to excessive heat and direct sunlight. Store bottle in the outer carton. Keep cap on bottle when not in use. Product foams on contact with earwax due to release of oxygen. There may be an associated crackling sound. Do not use if tamper-evident safety seal is broken or missing. Misc: Carbamide Peroxide, 6.5%. Earwax removal aid. Safe, gentle, non-irritating. Quality guaranteed. Compare to Debrox active ingredient (This product is not manufactured or distributed by Prestige Brands Inc. owner of the registered trademark Debrox). Questions? 1-888-423-0139. Quality Guaranteed: This Top Care product is laboratory tested to guarantee its highest quality. Your total satisfaction is guaranteed.