Is this where soap powder fabric softner ect goes in that drawer..
I clean mine every 5th wash now because my drawer done this and was minging buildup of everything
We clean the holes with a cable tie , gave mine a really good scrub a couple of months back and since then I have started leaving drawer open , not had to do it since
We had this under our fridge, place started stinking for days, wasn't until the fridge was pulled out that the smell was coming from the drip tray, it was rancid took it apart, cleaned it & no more smell.