I have a problem with pantry moths. They can seem to get in to just about everything. I have had to put a seal on the screw top lid of my plastic rice container as they even got past the screw lid. They appear to get in anything with the smallest of spaces and lay eggs. I have thrown out a bag of plain flour and self raising flour this week even though i thought they were well sealed with a tie. I will have to empty it and kill all but they will be back as I have donethis before.