What can occur if aerosol instructions are not followed?

Improper use leading to ineffective results is the correct answer because aerosol products are designed with specific application instructions for a reason. Following these instructions is crucial to ensure that the product functions as intended. If the guidelines, such as shaking the canister, maintaining the recommended distance while spraying, or using it in a well-ventilated area, are not adhered to, the aerosol may not apply evenly, may dry too quickly, or may fail to activate properly. This can result in subpar performance of the product, meaning the desired effect—be it cleaning, coating, or another intended outcome—may not be achieved.

In contrast, using the aerosol according to the manufacturer's instructions optimizes its effectiveness and ensures that any safety measures are also observed. Failure to follow those instructions can lead not only to product waste but also to potential safety hazards, such as overspray in unintended areas or inhalation of fumes in poorly ventilated spaces.