I've bought a new ukelele and it's been quite a while since I've last held a musical instrument (a year, maybe), so it might be possible that I'm just quite rusty with toning a guitar/ukelele.
I tried toning it with a help of an online tuner, and it does tune quite well after I do it. However, give it 1-3 minutes, one or more of the strings will be out of tune.
Is this something normal for ukeleles or newly bought string instruments in general or do I have to worry and get a new one?