cleaning up is so easy...
from my experience, once in 2-3months, you need to lift up all the tiles, because no matter how snug fit your tiles are, there would still some tiny debris slip underneath it.
once you clean all those debris, you can just put the tiles back in. should not take you long tho, it depends on how big your tank is. took me like 30 minutes to lift up all the tiles, clean the small debris real quick, put the tiles back in, on a 8' x 2.5' footprint.