Here is how to deal with Acer Aspire 3650 Keyboard problem:
Give your Acer Aspire 3650 Keyboard a few gentle shakes. A small amount of debris isn't a problem unless it's actually interfering with the operation of a key. Shaking can dislodge small articles into parts of the keyboard where they won't cause a problem.
Rid your Acer Aspire 3650 Keyboard of debris particles using a specially made keyboard vacuum. You can even get one that's portable and powered by a USB plug (see link below). These machines are specially made to clean the crevices between keys. You may find that you need to remove some keys in order to get access to the places that most need cleaning. See Section 3 for information about removing and re-attaching keys.
Purchase a can of compressed air and use it to dislodge particles. These, too, are specially sold for cleaning dust and debris from electronics and will be fitted with a fine spraying attachment in order to fit into tight spaces. You can find them at hardware stores and electronics sellers.
Acer Aspire 3650 Keyboard Description:
Layout: US Layout
Status: Genuine and new Acer Keyboard !
Remark: Ribbon cable included
Full 12 months warranty!! No Returns Due To Improper Installation!