1 - Maintain cleanliness
The first step in preventing a cockroach infestation is to maintain rigorous cleanliness on board. Be sure to clean surfaces regularly, store food in airtight containers and never leave food exposed.
2 - Eliminate cardboard boxes as much as possible
Cockroaches and similar insects love cardboard, especially when it's a little damp. What's more, by bringing a cardboard box on board, you can accidentally bring insect eggs on board. An effective solution is to replace these cardboard boxes with plastic containers, with lids if possible.
3 - Seal cracks and openings
Cockroaches can enter your boat through small cracks and openings. Inspect your boat regularly to identify and seal any potential entrances.
4 - Clean damp areas
Cockroaches are attracted to moisture, so it's important to keep your boat as dry as possible. Repair water leaks and use dehumidifiers if necessary.
5 - Eliminate food sources
In addition to maintaining cleanliness, eliminate potential food sources for cockroaches. This can include storing food that is too easily accessible. Don't leave food scraps lying around, and make sure you close the garbage can properly. If possible, remove garbage and garbage cans from your boat as quickly as possible.
6 - Use natural repellents
Certain natural substances, such as vinegar, lemon and mint, are known to repel cockroaches. Spray these repellents around areas where cockroaches are likely to hide.
7 - Use traps
Place roach traps in your boat to catch any roaches that wander in. You can opt for commercial traps or make your own using plastic bottles and tape.
8 - Use insecticides
If the infestation is important, you may consider using insecticides to eliminate the cockroaches. Be sure to choose products that are safe for use in marine environments, and follow label instructions carefully.
9 - Boric acid and powdered sugar
Commercial products are not always very effective. A good trick is to mix boric acid with powdered sugar. Once the mixture is homogeneous, make small balls and scatter them around the boat, especially in all the dark trunks and corners. They will eventually dissolve, but if you want to recover or replace them later, place them on small pieces of aluminum foil. Make sure you wear gloves.
Insects attracted by the sugar will eat the balls and die. Just collect the dead insects quickly.
10 - Call an exterminator
If you can't get rid of these little creatures, the last resort is to call in an exterminator. They can help you assess the extent of the problem and put in place an effective elimination plan.
