Sodick EDM - Water starting to smell odd and suds coming out of pumps.

So I've recently started noticing an odd smell coming from the water in my wire burner.
Right around the same time I started to notice this smell white suds started to come out of both pumps.
I haven't changed anything as far as what I'm burning and our consumables.
I did notice however that the resistance is down to 4.5. I read in the manual that it generally tried to keep it between 5.5 and 6.5.
So obviously I'm thinking that the resin tank needs to be switched out, but I actually did that about 2 months ago and a resin tank usually lasts us at least three months sometimes four.
Also, over the 2 months that this tank has been installed I have been running much less parts then in previous months. But the machine is still on for the same amount of time.
To get to the point, I'm wondering if the DI resin tank could possibly be bad after only 2 months. If it is, then what possibly could have caused it?
I may even be going in the totally wrong direction. Does anyone have other suggestions as to what could be causing the smell and suds?

Thanks for your time and advice!