irregular stitching

[mindgraffiti.livejournal.com]

ok i looked through the faq's and didnt find anything.

i'm having trouble with my less than great sewing machiene. i got it at target, its the super inexpensive singer much like this one. ok heres the problem: some stitches are perfect and others are wide apart. in just one straight stitch. completely irregular. its rather frustrating, i've tried messing with the tension and that doesnt help. i already returned / exchanged one because of this. im hoping maybe theres an easier solution? i'm just sewing through t*shirt material, its nothing special. rather frustrating though.

thanks in advance!