Many players believe that the reels must physically stop or that a game becomes "due" for a win. In reality, the outcome of every single spin is decided the exact millisecond you press the spin button. The visual animation of the reels spinning is simply a presentation—a cinematic way to show you a result that has already been determined by the software.
This is made possible by the Random Number Generator (RNG). The RNG is a complex algorithm that generates thousands of numbers every second, even when no one is playing. When you initiate a spin, the RNG picks the current number and maps it to a specific combination of symbols. Because the RNG is truly random, every spin is an independent event. This means the result of your previous spin has zero influence on the next one, regardless of whether you just won a jackpot or had a long dry spell.