i think its cleanest or more clean cleanest sounds more proper
The comparative and superlative degrees of clean are cleaner and cleanest.
cleaner, cleanest
looser
drier, driest
more polluted, most polluted
Cleanest is the superlative degree of the word clean. Cleaner is the comparative degree
cleaner, cleanest
cleaner, cleanest
The comparative and superlative degrees of clean are cleaner and cleanest.
The comparative form of the word "ugly" is "uglier," and the superlative form is "ugliest."
What's the comparative and superlative of the word "exact"
The comparative is "stricter" and the superlative is "strictest".
Comparative: shallower Superlative: shallowest
The superlative of "sad" is "saddest" and the comparative is "sadder".
fewer - comparative & fewest - superlative
The superlative is cloudiest; the comparative is cloudier.
The comparative is later, and the superlative is latest