Keep in mind that roaches can slip through cracks and holes that are as small as 3 millimetres (0. 12 in) high. [1] X Research source
Allow the caulk to dry for as long as the product recommends. Cockroaches can wedge themselves into spaces that are only 1–2 millimetres (0. 039–0. 079 in) thicker than they are. [2] X Expert Source Kevin CarrilloPest Control Specialist Expert Interview. 22 October 2019.
If you find a very small hole or just want a temporary fix, you can cover the hole with 1-2 layers of heavy duty tape, such as Duct Tape.
Roaches may be able to crawl up bed skirts as well. If you have one, take it off of your bed and put it away.
Roaches are especially drawn to cardboard and newspaper, so get rid of any newspaper and/or switch out any cardboard boxes for plastic storage containers. Try to keep dirty laundry in your laundry basket and clean laundry folded in your dresser or hung up in your closet. Remove any wallpaper, shelf liners as they eat the paste on the back of it.
Remove anything with glue, starch, soap, fabrics, wood as well, and sources of water, as they’ve got a very wide appetite. If possible, keep food out of your bedroom completely. If you must store some in your room, keep all of it in tightly sealed boxes or bags. Make sure the seal on the fridge door is in good shape, as the younger ones can get inside.
Coffee grounds can effectively repel other insects as well, such as ants, due to the caffeine they contain.
Sweep or vacuum up the mixture after a few days and dispose of any dead roaches that you find. This mixture is safe to use with pets and children in the home.
Keep boric acid away from children and pets, as it is poisonous and can be very harmful if consumed. Don’t forget to vacuum or sweep up the boric acid after a 1-2 days. Boric acid isn’t effective when it’s wet or sprinkled in excess.
