They may be fungus gnats that lay eggs in the damp soil of houseplants. Let the soil dry-out and the eggs will die.
no.... they don't die off completely they will remain dormant and begin their development once the soil is moist again.
Hi Debbie, this is a very comprehensive article that helps you identify what the bugs are and how to eliminate them. Hope it helps. https://getbusygardening.com/control-houseplant-pests/
I spray my house plants with Young Living's Thieves cleaner and it helps get rid of fungus and bugs.
water with soapy water
try these ideas: https://www.craftylittlegnome.com/fungus-gnats-houseplants/
get Mosquito bits https://www.google.com/search?q=lowest+cost+mosquito+bits&safe=active&sa=X&rlz=1C1CHBF_enUS750US750&tbm=shop&tbs=vw:g&ved=0ahUKEwiwkrzPlorjAhUQqZ4KHbWhDeQQvQ0I_gI&biw=1366&bih=657 and cover top of soil on each plant then water well gone in 1-2 days, repeat in 7-10 days when you water again non toxic or get Nematodes for soil beneficial soil microbes that kill them https://www.arbico-organics.com/category/pest-solver-guide-fungus-gnats