any suggestion for cleaning my Shedua fretboard?

will this will do ? :

https://www.sweetwater.com/store/detail/PRSConditioner

You don't want to clean your fretboard. You want to play it.

the dirt is preventing me from playing

I just use straight up lemon oil. Way cheaper. For the same price you can get a good sized bottle that will likely last you many years. I'm still on a bottle I bought 15 years ago and it's nowhere near running out. I guarantee the only thing you're paying extra for with the PRS oil is that is says "PRS" on it

For my Sticks and my guitars, I do a full on cleaning maybe once a year. I use lemon oil along with #000 grade steel wool. Yes I know that sounds harsh but #000 is the grade furniture makers use to polish. It takes dirt off very quickly and, along with the oil, leaves the fretboard looking fantastic. It's a process I stole from a couple of guys who ran a local music shop. They sold a lot of used and consignment instruments and this is how they made them look all shiny and new before they put them out on display.

Regardless of what you use (even Emmet's Watco), the key here is to wipe the fretboard thoroughly when you're finished and allow a long time to dry completely. I'll generally let an instrument sit around for 3-4 hours before I even think about putting strings back on.

You can get Watco@ Home Depot now. I'm still using my first bottle of lemon oil also. Cleans and nourishes. Everything I see w/ a Guitar Company name on it can be bought/found/built cheaper. Look at French polishing videos you'll get the picture.

Actually now that I think about it ... I can't remember if the steel wool is #000 or #0000 grade. Let me double check when I get home in a couple of hours and I'll post back. Wouldn't want anyone to scratch up an instrument because of me

Glenn is exactly right. 0000 (four zeros) steel wool and pure lemon oil. As he said, wipe it off really good and let it dry thoroughly. BTW, you need very little lemon oil. Just barely enough to get things wet. Scrub gently as if you were buffing the surface.

Karma

Yes ... I double checked at is indeed #0000 (four zeros) grade steel wool.

And if you still not shure what to use , test it.
The stick has a nice feature: the pickup can be removed easily ( 2 screws)

Remove the pickup, test any oil , liquid cleaner or whatever on a small spot on that place. There is no need to remove the strings for this.
If the result is fine and does no harm to the wood, then go for the visible parts (fretboard) of the stick.

I always wait for about a week , just to get sure, that such experiments do no harm to my instrument

Im looking forward to getting a wood stick delivered so I can clean it