I'm pretty new to Floyd Rose. My Floyd Rose wont stay in tune. My strings will go sharp after 15 minutes after tuning, the bridge is a bit higher from the body but the string action is really low as well. Please help if there's any way to fix that.
When tuning a Floyd Rose, it is best to have the fine tuners about half way through their range, then tune all the strings using the machine heads.
Then give the term bar a good shake, both sharp and flat, and then tune using the machine heads. And then properly tighten your locking nut. At this point it is likely to be slightly out of tune again, so another bit of whammy bar and then tuning using the fine tuners should be enough.
When I do that I can expect it to stay in tune for a week or more if I don't play it, or most of a gig if I'm really hammering on the bar.
From your comments I can only think the lock nut may not be tightened enough.
Additionally, your trem should sit parallel with the guitar surface, so if it isn't, tighten or loosen your springs by turning the screws in the back of the guitar that hold the spring bar. We have various other posts on this here.
they might be binding at the saddles. What worked for me was 1) moving the strings off the saddle (you could wedge something under the bridge to get access with the strings then going all floppy 2) rubbing a soft graphite pencil onto the saddle where the string meets so that some graphite is deposited there. 3) returning the strings to pitch
I am not a Floyd Rose user personnaly. So this answer is kind of a "link to someone who knows better" type of thing, hoping that it will help you.
Phillip McKnight has done a great series of videos about Floyd Rose: