Unless you've a need for larger trays, there's no need to replace your Cesco trays. They can be cleaned up with houshold bleach just like new. I have a set of the 11x14 Cesco trays and yes they do tend to get kind of cruddy, but the good news is that the bleach works. You don't need to use it full strength either. A few oz. diluted in water will do the job just fine if you don't let the crud get too bad. Let it sit for a while and they'll be good as new.