hi peeps i stopped doing duo for a while so all the skills on the bottom third of my tree were a bar down. About a week ago I went in to re-gild the tree, but the skills just won't stay gold. I do them over and over again, but within an hour they drop down a bar again. Sometimes they don't turn gold at all-- I do the practice but there's no change. Needless to say, it's really frustrating. I don't use the hints and I hardly make mistakes, but even so the things won't stay gold. Is this just because I spend so long without doing them? If I keep repeating them, will they one day stay gold for longer than an hour?

grazie raga