Your mechanical keyboard need regular cleaning to perform well and last longer. Here's the safe way to do it without damaging sensitive components.
Disconnect the keyboard. Use a keycap puller to carefully remove all keycaps. Place them in a bowl of warm soapy water to soak.
Turn the keyboard upside down and shake gently. Use compressed air to blast crumbs, hair, and dust from between the switches.
Dip cotton swabs in isopropyl alcohol and clean around each switch stem. Brush stubborn grime with a soft brush.
Scrub the soaking keycaps with your fingers, rinse thoroughly, and lay them on a towel to dry completely (several hours).
Once keycaps are completely dry, press them firmly back onto the correct switch stems. Reference a keyboard layout photo if needed.