What to do if i am flagged by steemcleaner?

Ah, great question.
If you are flagged by steemcleaners than you must have done something against steemcleaners rules. Steemcleaners is here to stop plagiarism/spam/bad content.
So if you had done anything like that, you have to stop it so that you don't get any flag in future.
If you want to remove your post's current flag, than it will depend why the post was flagged. In most cases they flags for plagiarism. If you received a flag for this reason than they will never remove the flag. But if you were flagged mistakenly or they detected plagiarism of your post which matches with a content on internet but that content is yours then there is chance of removal of the flag.
You have to just join there discord server and contact with a official regarding this matter. Here is the link to join steemcleaners disord server- https://discord.gg/5svhSYf . You must contact with them before your post age crosses 6days and 10 hours as they can't remove the flag after this time.
On other cases you have to rectify yourself for which you were flagged.