Is there a way to clean my MacBook air?

Depending to what extent you use the word 'clean' in regard to the Mac.

To clean case, keys, or display, there are preferred instructions; to 'clean'

the hard drive, you may carefully study how to erase and re-install an OS

from backup or an all-new installation.

There are no cleaning utilities recommended for the Apple computer, such

as some refer to 'clean' when something has run amok or otherwise in-op.

Should there have been an adware or malware, use adequate precautions

& avoid these situations where issues are often self-inflicted. No antivirus

is necessary nor would any be required.

Please define the use of the word 'clean' and your expectation when so doing.

Not sure, but I don't think I've even 'cleaned' either the software or the hardware

in over 500+ macs that I've owned, restored, maintained, or donated. ~ But that's

a matter of definition.

It's not possible to hack an iOS device unless jailbroken. As far as Mac OS, it's practically impossible unless you gave someone physical access to your Mac. It could be done remotely but requires the kind of sophistication and effort that no hacker could be bothered with unless they know you have state secrets on your Mac.

See if the following article can help answer your question: How to clean your Apple products - Apple Support