If you have young children who enjoy stickers (and most do), they probably also like to affix them to all kinds of surfaces around your house--including hardwood flooring. Some stickers are easily removed, but others have strong adhesive and will require some elbow grease. The trick here is using a cleaning technique that won't harm your floors but is effective.
Fill the spray bottle three quarters full with rubbing alcohol.
Spray a small amount alcohol directly on the sticker and let sit for a few minutes.
Use the microfiber cloth to gently rub the sticker area, scrubbing a bit with your fingers and/or fingernails if necessary.
If the sticker residue is especially stubborn, use the no-scratch sponge (scrubbing side) to remove it.
Wipe the area clean with the cloth.