There are different issues here.
Re roaches - treat with roach gel, following instructions carefully. In a multi-unit, in most cities in the state the landlord and the tenant both have responsibility for treatment for pests. do this immediately, both in her apartment and in the others in the building.
Re wasting utilities - speak with her about the importance of shutting windows when a/c is running.
If your main cnocern is you want to evict her, does she owe you rent? If so, you can proceed immediately by filing a landlord's petition. If she doesn't owe rent, you can send her a ten day notice for "laying waste to the property," After ten days is up if she hasn't corrected the issues, then you proceed wtih an unlawful detainer.
--205.188.xxx.xx