Product review (3 stars): Cheap...and built that way
Given that this is the second time I've ordered this replacement part, it doesn't seem to be built to handle typical household use.  Having said that, there aren't many viable options since the part is fairly specific to that application.  On the plus side, it's inexpensive.  So if you're replacing this part, buy two so you have another on hand when the first replacement strips out.