I'm gonna put in a vote for this stuff .
Mix it with water, pressure spray it on your home perimeter, outdoor patio, and you won't see an ant for 6 months at least.
https://www.amazon.com/dp/B004TY89YM/ref=cm_sw_r_cp_apa_glt_fabc_5MJ115R4FF5J3SKCDG5C
Buy this with a pump sprayer and wear a good mask. It's what the professionals use and you can water it down way less to make it even more potent. Spray around your house/windows/doors and inside your house (full edge of every room) every month or so. It is quick to spray - then you just want to wait outside for a bit for it to dry and the house to air out.
Talstar Pro 3/4 Gal | Multi Use Insecticide https://www.amazon.com/dp/B004TY89YM/ref=cm_sw_r_cp_api_glt_fabc_FM318DA7EY4QEW1AKK0G
Should last you years and years.
Talstar Pro: https://www.amazon.com/Talstar-Pro-Gal-Multi-Insecticide/dp/B004TY89YM
This is a barrier product - does not kill instantly but will kill everything that traverses the barrier after application.
You can also spray inside with this product - although I would suggest a weaker mix of Talstar to Water. Spray around appliances and other places where bugs like to hang out. Same premise applies - this will dry and leave a barrier that will kill bugs after they walk across it.
and this:
Buy Telstra and a hand held 1 gal sprayer on Amazon. Now you have bug spray that will last you 10+ years. It's the stuff pros use. https://www.amazon.com/Talstar-Pro-Gal-Multi-Insecticide/dp/B004TY89YM/
Yes it is a roach. You can hire people to fix the problem or you can diy. The product linked below is insecticide. What happens is when roaches walk over it the substance sticks to them and they die. Then other roaches come along, eat the poison roach, and they die. You can also purchase some IGR and mix with the insecticide. IGR will prevent the roaches from hitting puberty, thus rendering them unable to reproduce. In my first apartment I had a roach problem and the exterminators hired did not fix the problem. So I had to take care of it myself.
The fact that you’ve seen one roach means there’s plenty more to come, order the stuff below and your problem should go away.
Talstar Pro 3/4 Gal | Multi Use Insecticide https://www.amazon.com/dp/B004TY89YM/ref=cm_sw_r_cp_api_glt_fabc_P66AJTCSHH3CNNPTK93Z
VIVOSUN 1.3 Gallon Lawn and Garden Pump Pressure Sprayer with Pressure Relief Valve, Adjustable Shoulder Strap https://www.amazon.com/dp/B07L4Q3MVY/ref=cm_sw_r_cp_api_glt_fabc_CBJ5HBKRX3DV68QJXFJE?_encoding=UTF8&psc=1
CSI Tekko Pro IGR Insect Growth Regulator 16 Oz https://www.amazon.com/dp/B00RW197XG/ref=cm_sw_r_cp_api_glt_fabc_9GT1KENWHT9KFGVGNAT8