If you sewing machine is playing up and your stitches are coming out all bunched or aren’t being sewn straight, then it might just need a simple fix: re-thread your machine. I know this sounds so simple, but by taking your thread off and threading it so that it is nice and taut again, this can resolve some bunching issues! Another thing to try before you drag your machine off for a service is the bobbin holder area. This might have got fluffed up so remove your bobbin, use a small brush to remove any lint and then re-insert your bobbin. Good luck!