Always clean your dentures over a basin of water or a damp towel to avoid breakage if you drop them.
Hold them gently between your thumb and fingers, and brush them using a denture brush and denture cleaner or soap – all readily available at any drugstore.
Use only lukewarm water and avoid gritty pastes or powders.
Do not use:
Hot water
Whitening toothpaste
Bleach
Abrasive cleaners