Idiom or proverbs for the word "not pleasant" [closed]

Furthermore, the toilets should be more clean because some toilets are _________ to go into.

What is the idiom or proverb that could be used for the word "not pleasant"?


unpleasant, filthy, irksome, horrible, nasty, miserable, awful, disgusting, dreadful, miserable, nauseating.

Whatever suits you better.