I usually won't do any interval inspection on the unit internal condition, it will not bring positive outcome but the landlord will be implicated as a fussy landlord.

Even if the internal unit is damaged, what can the landlord do even if found out during the inspection? The tenant will say they are still renting, yet to return back the unit. When returning the unit only they will make it good, the landlord already hold the 2 1/2 months deposits. End up, the landlord who did the interval look like a trouble maker.

If you want to do, no one going to stop you but the chances you will offend the tenant is high. Coz they will be thinking, this landlord, suka-suka come check. If like that, there is totally no privacy at all. They will likely move out.