ive opened opened up my mech kb due to ants having a party in it. i tried brushing them off before but they kept coming back. this time around, i noticed that they were eating thru the foam layer on my kb which i cant just remove and leave out. so i took apart my kb once more and after i've made sure that i've brushed them all off, there's this ant repellent chalk that i used and spread it all over the insides of the kb, every layer, just be careful around the pcb so you don't damage a connection/contact.

haven't seen those ants since then.

hope you find a solution to yours.