You can check latest items and cases drop wipe/reset, and countdown to the next drops reset. After wipe - you have a big chance to get in-game drop (Case, weapons, and graffiti). When you recieve your first weekly drop, your next chance reduced. it usually resets every Wednesday.
Ingame drops reset happens every week:
- Reset in-game chance to get drop at the end of the match
- Reset Weekly XP bonus
- Resets level up reward (Weapon from map collection, or graffiti)