What is the reason behind breakage of ointment tube cap?

The breakage of an ointment tube cap can occur due to several factors, including material fatigue, manufacturing defects, or improper handling. Exposure to extreme temperatures can also weaken the plastic, making it brittle and prone to cracking. Additionally, overtightening the cap can create stress points that lead to breakage over time. Regular wear and tear from repeated use may further contribute to the cap's deterioration.