Why is my `minutes` number goes into negatives?

I've been working on a timer for a few weeks now. When I try to subtract minutes from 0, it goes into negatives without touching the hours. I've tried a few methods, read the documentation, and watched several YouTube videos, but none of them help me. Here's the code I used:

seconds--;
    if (seconds === 0) {
        seconds = 59;
        minutes--;
        if (minutes < 10) {
            minutesText.innerText = '0' + minutes.toString()
        } else {
            minutesText.innerText = minutes;
        }
        if (minutes === 0) {
            minutes = 59;
            hours--;
            if (hours < 10) {
                hoursText.innerText = '0' + hours.toString()
            } else {
                hoursText.innerText = hours;
            }
            if (hours === 0) {
                window.clearInterval(interval);
            }
        }

    }
    if (seconds < 10) {
        secondsText.innerText = '0' + seconds.toString();
    } else {
        secondsText.innerText = seconds;
    }

It never touches the hours-- and doesn't make minutes be equal to 59.

(Sorry if it's an easy fix, I'm just getting started on JS)