ac condensation jell

You can buy tablets to put in the drain pan on a regular basis. They will keep the mold from building and clogging the drain line.

If you mean there's a slimey substance in it, it's probably some kind of mildew.

ahh yes...that's air conditoner snot.

thanks to all for theac input

I am agree with your answer

"tablets" and pads that are set up into your drain pan that contain biocides will help restrict the development this is usually achieved at the starting of the chilling season and the pads and tabs are time released to allow for control for the duration of the season. Most HVAC provide homes will carry these and you can ask "pan tabs"