944 spider problem

Today when I left work, the 944 didn't want to start. It seemed like a battery problem, since it just clicked, with no attempt to start. the lights and radio were working with no problems, so I thought maybe there was corrosion on the cables or a bad connection. I tried to wiggle the negative cable but it was on securly and wouldn't budge, the I lifted the cap of the positive cable, and saw a little spider buliding a cocoon type web (most likely planning to lay some eggs there) on my postive battery cable. I shooed the spider away and scraped the web off the battery, then the car started right up.