Don't put garden clippings from diseased or mildewed plants in your compost bin.
The cakes are liable to become mildewed, and require constant turning and occasional rubbing in dry " poppy trash " to remove the mildew, and strengthening in weak places with fresh poppy leaves.
To remove mildew from painted furniture mix ½ cup bleach into 4 cups water and wash the mildewed area.
If a carpet tile was to absorb water and become stained or mildewed, it is possible to pull it up for cleaning and either replace it again, or throw it away and replace it with a new one.
The leather should be in good condition and not mildewed or frayed.