I have only been sewing for a year or so and have noticed a problem with durability on some of the clothes I have sewn the kids. After some of the clothes are washed a few times some of them are starting to come apart at certain seams. This has happened at the end of seams for both sewn and serged items and in one case in a crotch of some pants. I have also noticed it on a few things I have appliqued or top stitched. I am using good quality quilters cotton fabric and Coats and Clark Dual Duty thread. In many cases I am spending more to made clothes than I would it if I bought them. For that reason I want them to last at least as long as store bought stuff.
Do most of you wash them differently than regular store bought clothes? I ask because I have not noticed this until after I take them out of the dryer. I suspect I may need to air dry the stuff I sew and skip the dryer.
Are there some tricks to more durable stitching other than the typical steps of adding a few backstitches? To fix this do I need to sew seams and go back and serge the edges as well. I sometimes serge without the extra sewn stitch and would think that would be adequate.