The superlative form of clean is "cleanest".
Cleanest is the superlative degree of the word clean. Cleaner is the comparative degree
The comparative and superlative degrees of clean are cleaner and cleanest.
The superlative form of clean is "cleanest".
more clean, cleaner
Cleanest
They are cleaner and cleanest.
cleaner, cleanest
They are cleaner and cleanest.
cleaner, cleanest
cleaner, cleanest
i think its cleanest or more clean cleanest sounds more proper