No frost Fridge/Freezer.

I have a zanussi its much older than yours but it does very slowly actually get a frozen lump of ice behind the the salad drawers which I deal with every month or so like you I regularly check the drain hole which is always clear. I’ve no idea what causes it though. The temperature is ok as I have a ioniser/ filter that shows the temp.

Ditto. The ice forms at the bottom of the freezer in mine, as well as wet salad drawer. I put paper at the bottom… No idea how to deal with it.

Try asking Zanussi. If you go on their website you should be able to contact them and ask.

Buy a drain snake from they’re usually about £4.
This will work far more effectively than the plastic tool.

I have this problem when my DH pushes things right to the back of the fridge so that they touch the back wall. The condensation, instead of going down the wall and into the little drain hole, drips off whatever is touching the wall and forms a puddle. Have you checked that you haven't got anything squashed up against the back of the fridge?

Had this problem also. I use a cotton bud to clean out the drain hole. Better than the plastic stick provided.

I've tried everything I can think of to stop the water pooling in the bottom of my fridge. Nothing works! I took out the plastic thing, and have tried cleaning out the hole with cotton buds, a barbecue skewer, and several different small pokey things. My fridge freezer was new when we had the kitchen fitted 20 years ago. I think it may be time for a new one.

I have a separate larder type fridge and that does the same - I use a long craft type pipe cleaner in the hole and that only slightly improves things. I notice it is far worse when the fridge is really full - there are times I put a clean folded tea towel under one of the salad drawers. Mine is an Ariston/Horpoint.