Having trouble with practicing

[Ratatouille]

Recently I've been working on Simandl's Etude 17 and about a few days ago I was pretty decent at it and at that point I had been practicing for a week or so on the piece. However, after a few days of practicing the piece(I usually spend about 15 min a day on the piece) I noticed that I was making more and more mistakes on the piece. At this point I've kind of digressed to the point where I'm worse at the piece than I was when I first started. All help is appreciated.

 

[Tom Lane]

I've experienced this too and when it did it was usually because of one of three things:
1) I'm bored with it and not focusing; probably the most common.
2) I was fooling myself a few days ago and that performance was a fluke
3) I started using a different fingering that doesn't work as well as the first - now forgotten - fingering

If I'm bored, coming back to it in a week helps. Speeding it up, slowing it down, playing it in a different rhythm, all help. If I was fooling myself, ah yes, then I need to take the piece more seriously, explore and work out my fingerings, get the sound of the piece more in my ear - singing, try different tempos. If I developed a new bad habit, some consideration about how I'm approaching the piece usually uncovers my foolishness and just takes a bit of practice to get back on track.

Hope that helps.

 

[Ratatouille]

I've experienced this too and when it did it was usually because of one of three things:
1) I'm bored with it and not focusing; probably the most common.
2) I was fooling myself a few days ago and that performance was a fluke
3) I started using a different fingering that doesn't work as well as the first - now forgotten - fingering

If I'm bored, coming back to it in a week helps. Speeding it up, slowing it down, playing it in a different rhythm, all help. If I was fooling myself, ah yes, then I need to take the piece more seriously, explore and work out my fingerings, get the sound of the piece more in my ear - singing, try different tempos. If I developed a new bad habit, some consideration about how I'm approaching the piece usually uncovers my foolishness and just takes a bit of practice to get back on track.

Hope that helps.

Thank you! I'll definitely try out some of that stuff.