Bird Inc. Carefree Enzymes "Carefree Enzymes" Birdbath & Statuary Cleaner (98510) 98510 (014425985101)
Spray directly onto surfaces, let stand to loosen and lift dirt/residue/debris. Rinse with damp cloth. Scrub lightly for stubborn stains. Safe for all surfaces: plastic, concrete, rubber, vinyl, stone...
Pros: Makes cleaning birdbaths easy. Keeps then clean longer. Safe around animals, biodegradable.