I have several Amigas under my bed (A1000, 2000, 500, CDTV, Infinitiv Tower etc., some have a turbo card).Recently I had a thought: Are there maybe any batteries in the computers that could leak?
Unless you have added an Elbox memory card the CDTV doesnt have a battery backed up clock.
The A500 wont as standard either but you may want to look at the card in the trapdoor to see if that has a battery, it may, and it wont be lithium so may leak.
The A2000 has a battery on the board, below the CPU, Check it.
The A1000 does not have a battery backed up clock, worth checking your upgrades to see if they add one though.
A1200 tubo cards almost always have a battery backed up clock, mostly lithium but still you should check them over.
The infinitiv Tower is a towered A1200 right? if so then the A1200 doesnt as standard but your CPU card or clockport card may.. although they will probably be lithium.
to remove them you need a soldering iron and some pliers... a desoldering tool (solder sucker or copper tape) is also good.
Hope that helps