If the gel is still wet then you can clean it up using a damp paper towel. If the gel has hardened, then a butter knife or something to scrape up most of it and then use a wet paper towel to get up the residual left on the surface.
Gourmet Ant Bait Gel is effective against all common types of household ants, including carpenter ants. Inside a home it will typically last about 2 -3 weeks before it gets too hard for ants to eat. This product is mainly meant to be applied inside the home; however you can use it outside. It will not last very long outside, especially if left in the sun, it will dry out quickly. You should only apply this product if and when you have ant activity. This product is a bait and is meant to attract ants, so you would not want to place it inside unless you had activity. For more information on treating carpenter ants, please click on the article below.
http://www.domyownpestcontrol.com/carpenter-ant-baiting-tips-a-138.html
http://www.domyownpestcontrol.com/carpenter-ant-control-c-1_177.html
Gourmet Ant Bait Gel should be applied in areas that are inaccesible to children and pets. We suggest also applying the gel in bait plate stations. The active ingredient is a borate and only affects insects that ingest it because their stomach chemistry is different than that of mammals.
Remove as many competing food sources as practical. Vacuum or sweep floors to remove crumbs, etc. Ants are attracted to and will feed on Gourmet Ant Bait Gel until they die. Repeat placement of the bait until satisfactory control has been achieved. Remember, For long term control or for heavy infestations, Gourmet Ant Bait Gel may be used in Ant Café or other similar bait stations. Using a bait station allows for placement of a large amount of gel without having it dry out. To use Ant Café bait station; open the lid, add Gourmet Ant Bait Gel until station is at least half full, close lid and place according to directions for use. Please refer to our product page for complete pest control guide on the Gourmet Ant Bait Gel.