Microwave Cookware Stain Proof - Red Fish Steamer 2 "microwave fish steamer" Mrs Harpin 11 November 2015 I purchased the fish steamer in September 2015. The fish cooks beautifully in it. However I find it extremely difficult to clean. I tried lightly oiling the plastic before putting the fish on, it made no difference. Hopefully this can be sorted out by design team. A note from the team We're sorry to hear you've experienced this problem - hot waster, washing up liquid and an sponge should bring the fish steamer up clean. Alternatively, if you have a dishwasher it's fine to place it in there. The nature of the beast with fish is it may stick but we think you're right to slightly oil.We'll be in touch soon.