I've just thrown out my second grid. The two that I've bought so far are those inexpensive black ones you can find at Bed Bath& Beyond or Linens'n' Things for under $15 I think. The black paint buckles and then flakes and we don't want to ingest any of that stuff! Are there any better grids that don't cost more than $30 or do I need to spend more? I use them to grill asparagus or shrimp or when I don't want to skewer kabobs. Thanks!