Dishwasher insulation for heat

Question

I'm wondering if we can further insulate our dishwasher for heat. We are redoing our kitchen, new appliances, cabinets, etc. and shortsightedly put the spice sliding pull-out cabinet next to the dishwasher. The spices get warm when we use the dishwasher. There is a bit of room between the cabinet and dishwasher. Any recommendations for further insulation?