Had RAT problems recently, They were many "chhachundars" don't know what they are in english.
bought 3-4 packs of "Rat Kill" cakes and placed it on hidden locations, behind gas cylinder, under bed at farthest corner,
behind almirah near their entry point, which was open area at back of house.
a couple of days later found one dead, and they are now not coming inside as haven't seen them since 1-2 weeks.
For cockroach problem always use the Boric Powder method, its all over
google results, it would help you live without them if you do it for a month on sundays as queens stomach would explode due to that bait, recently some popular brand has launch a syringe like similar product.
Lastly, we've been cleaning Termite since last 1 week, they were in KG'S, they ate entire room full of unused items,
destroyed a HUGE Collection of books, my father is real angry about this loss.
this loss is worth lakhs,
Can't even mention what not eaten by termite in those idle rooms, still cleaning and will do pest control in coming week for this.
will post the termite process as I am still to get pesticide names and process myself.