Set snap traps behind the stove and fridge and under the sink, throw out food in bags or boxes mice could reach, and seal pipe gaps. Traps run about $14; a full kit $57–71.
Yes, roach bait works: many pea-sized gel dots in cracks where roaches hide, no spray nearby, fresh bait every week or two. A $27 box of four tubes vs. about $300 for a single pro visit.
Sticky roach traps rarely wipe out roaches; they show where to bait and whether it worked. A 12-pack runs about $10, and a bit of beer-soaked bread makes each trap catch far more.
Pepper-like droppings, egg cases, shed skins, a strong odor and roaches out in daylight. One adult on a sticky trap usually means a newcomer; nymphs of several sizes mean an established infestation.
Food, warmth, nesting spots and a gap about ¼ inch wide. Sealing food, pet food and garbage, moving bird feeders and woodpiles, and closing gaps costs little or nothing.
Mice sound like light scratching, scurrying and gnawing in walls and ceilings at night, with the odd high squeak. Rats are louder. Confirm with droppings, then trap nearby.
Gel bait plus sticky traps, not sprays: clean up food and water, put pea-sized dabs of bait where roaches hide, and recheck every 2–4 weeks. Supplies start at about $24; shared quotes for a full pro treatment run $450–$1,500.
Roaches smell musty and oily, from droppings and secretions, and you usually notice it only in a large infestation. Trace it with $10 of sticky traps, then bait and scrub.
Remove what they breed in (ripe produce, unrinsed recycling, a sour mop, a dirty drain), then catch the rest in a jar of $1.29 cider vinegar with a drop of dish soap. No spray or exterminator needed.
Identify the gnat, then remove what it breeds in: ripe fruit, wet potting soil or a slimy drain. A $1.29 vinegar trap and $4.97 sticky cards catch the rest; sprays rarely help.
Moths in the pantry? Find the infested food, throw it out or freeze it, vacuum and wash the shelves, and move dry goods into sealed jars. About $26 in supplies, no sprays.