please do not use ajax, if you have, clean it with a sponge or wet rag (unless you have a heppa filter vacume(one that actually works -if you can smell it it doesn't))
As far as the ants go, trust me the live in yemen and madacascar. Unless they are fire ants (which are territorial) then just do your best to issolate them. A mote is a great idea, as is vasaline.
Or you could just trust in mother nature. I have those little black ants in my viv, so long as jet isn't injurred, they wont bother him. Frankly I can go a little longer between cleanings if I don't fight them.
Now, if it is hordes we are talking abou that is a totaly different story.