fly paper only works for short term, once they know it hindi na sila nag papahuli sa fly paper. we have the same problem at home, except in my room , kse im the ultimater rat killer sa bahay, pag meron rat sa room ko never sya makakalabas ng buhay, i've caught more than 10 rats using fly paper, even manually.. and thrice, after trapping them in fly paper, i burned them, tutong, pero meron na visible na malaking daga sa bahay, and it seems that there is no stopping their production unless mag alaga ako ng 2 cats.. , the last time i use the fly paper with a trap, putting a cheese right in the middle of the fly paper, the next morning, wala na yung cheese, the the m ice didnt get trapped, no trace of anything on the fly paper, very clever