A: Excellent question! STEM Ants, Roaches & Flies Spray is designed to kill American roaches when sprayed directly and doesn't have any residual effects. If you have any other questions, please give our experts a call at 877-869-7546 (weekdays between 8 a.m. and 5 p.m. CT). We'd love to help you fight nature with nature! – Mindi, STEM Consumer Care

A: Great question! We haven't tested this specifically for use in cars. To avoid staining, test on an inconspicuous area before applying to surfaces, as this product may damage or stain some painted surfaces, hard or wood floors, furniture and plastics. Have a good day! – Brooklyn, STEM Consumer Care

A: Hey there! STEM Ants, Roaches & Flies is designed to help tackle bugs in and around your home. There's no need to leave the house after using this, as the smell will dissipate within a few hours; it may take longer if sprayed heavily. We do recommend ventilating the area and wiping surfaces with warm, soapy water to help get rid of the smell quicker. Have a great day! – Mindi, STEM Consumer Care

A: Hey there! STEM Ants Roaches Flies spray is made with botanical extracts that fight nature with nature and will kill pesky American roaches on contact. Have a great day! – Mindi, STEM Consumer Care

A: Thanks for reaching out! STEM Ants, Roaches & Flies isn’t designed to target fruit flies, but we’d love to help you find the right solution. Give us a call at 877-869-7546 (weekdays, 8 a.m. – 5 p.m. CT) so we can learn more about your situation and recommend the best option. Hope to hear from you! – Megan, STEM Consumer Care

A: Thanks for stopping by! We do not recommend using this on or around plants. We'd love to learn more about your situation to find the best product for you. Give us a call at 877-869-7546 (weekdays, 8 a.m. – 5 p.m. CT). Hope to hear from you! – Megan, STEM Consumer Care

A: Thanks for asking! STEM Ant, Roach, & Fly is not formulated to be used on carpets or upholstery. For any further questions, you can reach us 877-869-7546 (weekdays, 8 a.m. – 5 p.m. CT). Take care! – Megan, STEM Consumer Care

A: Hi there! Our STEM line of insect killers are Entomologist tested, made with botanical extracts to kill bugs; with fresh scent and no added dye, fragrance, or harsh chemical odors. Slight variations can occur during the production of our products that result in visual changes. These variations in color are not known to affect efficacy. You can still use this with confidence as directed. Take care! – Brooklyn, STEM Consumer Care

A: Hi there! To use, twist the nozzle to the "on" position. Have a good day! – Brooklyn, STEM Consumer Care

A: Hi there! Twist the nozzle to the on position to use. Take care! – Brooklyn, STEM Consumer Care