What is an important step to take when removing and reinstalling auto glass?

Ensuring proper adhesion with sealants is a critical step when removing and reinstalling auto glass. Adhesion is essential for the structural integrity of the glass, as it provides a secure fit that can withstand various environmental factors such as temperature fluctuations, moisture, and even impacts. The sealant also acts as a barrier to prevent water leaks into the vehicle's interior.

Using the same glass as the original may seem important for maintaining fit and function, but it is not as crucial as ensuring a proper seal. Centering the glass in the frame is important for aesthetics and functionality, but again, without proper adhesion, the glass could fail regardless of its position. Cleaning the surface area with alcohol is beneficial as it can help prepare surfaces for better adhesion, but it does not directly address the fundamental requirement of ensuring that the glass is adhered correctly for safety and durability.