If your filament is making a popping/cracking/hissing sound, or makes a rough/grainy surface on finished prints, your filament has probably absorbed some moisture. ABS, PLA, and other common filament materials are mildly hygroscopic, so they will readily absorb moisture from the air. This is especially true if you live in a humid environment.
The most simple way to remove the moisture is to place the entire roll in an oven for 2-3 hours at 185°F (85°C). Many ovens do not have a temperature setting this low. If the oven temperature is much higher than 200°F, the fibers can cling to each other and ruin the roll. A safer, but less effective treatment is to place the roll in a airtight container or bag with desiccant packs, salt and/or rice for several days or more.
To prevent the filament from absorbing moisture in the future, keep your filament stored in an airtight container with a desiccant.