who is liable

A roommate? Is her name on the lease or rental agreement? If so, then she might be able to give a written notice to the landlord to deal with the problem, and the landlord has a certain amount of time to do so… but this is unlikely if you know for certain that she brought them into the place. Check with your lease/contract and state laws about the landlord and tenants duties, rights, and responsibilities… it should make things clear. If her name is NOT on the lease/contract, and you just have an informal agreement among you, then whomever has their name on the actual lease or rental document has say in what to do. Also, you can ‘outvote’ her and have her take necessary actions or tell her to find someplace else to live. Or you can do it yourself (check online about how to get rid of them… but be sure NOT to put insecticides on your clothes, bed, or bedding—it will get through your skin and poison you).

A roommate? Is her name on the lease or rental agreement? If so, then she might be able to give a written notice to the landlord to deal with the problem, and the landlord has a certain amount of time to do so. Check with your lease/contract and state laws about the landlord and tenants duties, rights, and responsibilities… it should make things clear. If her name is NOT on the lease/contract, and you just have an informal agreement among you, then whomever has their name on the actual lease or rental document has say in what to do. Also, you can ‘outvote’ her and have her take necessary actions or tell her to find someplace else to live. Or you can do it yourself (check online about how to get rid of them… but be sure NOT to put insecticides on your clothes, bed, or bedding—it will get through your skin and poison you).

Normally the landlord is responsible for bed bug treatment, however, if you are sure the infestation was caused by your roommate, then you have another issue.

Let me tell you how to keep these bed bugs at bay:

1) Frequently vacuum
2) Don’t let covers, or bed touch walls or floors.
3) Buy a steamer for clothing. (DAILY go along your floor boards and mattress area. (The hot steam will kill adults and eggs laid by adults.)
4) Go to IFA or country type of store and buy Diatomaceous Earth (this is the secret stuff!!) Spread a layer around your bedroom walls and door.