Honestly, the steps above are the best advice, particularly the don't panic. Also, this is not a moral failing on your part, especially living in an apartment complex. Let your leasing office/management know, they may want to do a pro treatment thing, IDK.
Living in the South, we are continually having to deal with the little blighters, so keeping as clean a kitchen as possible is a big help. Cardboard boxes need to go out regularly - we actually store things like cereal and open pasta boxes in our fridge because they WILL go after cardboard as readily as they do food. They also have a thing for plastic bags, so keep an eye out there if you're still getting bags from shops.
We use the baits Vendetta and Advion in combination and they wiped out what was a pretty bad infestation (this house was previously occupied by a serious hoarder) without putting our cats at risk. Vendetta is on the pricey side for baits, but you put it out once and then not again for 4-6 months, whereas Advion is a once a month bait that's more for maintenance. We apply beads of the baits inside kitchen cupboards, along the back of sinks (kitchen and bathroom), in cracks around the tub, behind appliances (fridge, stove, microwave), in the pantry, and around doors and windows. Your best spots are going to be places Thea can't reach anyway - under counters and in cracks - but keep an eye for that as you're going along.
This is probably going to be something of an ongoing issue for awhile. Unless the whole building is bombed at the same time, they will just move around from unit to unit. You can be doing everything right and still get some invaders if another unit or even a neighboring building has an infestation, so again, don't panic and don't loose heart.
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Living in the South, we are continually having to deal with the little blighters, so keeping as clean a kitchen as possible is a big help. Cardboard boxes need to go out regularly - we actually store things like cereal and open pasta boxes in our fridge because they WILL go after cardboard as readily as they do food. They also have a thing for plastic bags, so keep an eye out there if you're still getting bags from shops.
We use the baits Vendetta and Advion in combination and they wiped out what was a pretty bad infestation (this house was previously occupied by a serious hoarder) without putting our cats at risk. Vendetta is on the pricey side for baits, but you put it out once and then not again for 4-6 months, whereas Advion is a once a month bait that's more for maintenance. We apply beads of the baits inside kitchen cupboards, along the back of sinks (kitchen and bathroom), in cracks around the tub, behind appliances (fridge, stove, microwave), in the pantry, and around doors and windows. Your best spots are going to be places Thea can't reach anyway - under counters and in cracks - but keep an eye for that as you're going along.
This is probably going to be something of an ongoing issue for awhile. Unless the whole building is bombed at the same time, they will just move around from unit to unit. You can be doing everything right and still get some invaders if another unit or even a neighboring building has an infestation, so again, don't panic and don't loose heart.