My Bosch KUR15A50GB refridgerator collects lots of water underneath the lowest draw (the clear vegetable draw.)

The fridge seal seems to be good so it shouldn't be letting in air which is then condensing.

I can't find the cause of this.

NB, December 2023

Read the manual you'll have received with the fridge.
Page 12, reference to item 10
Manual available from this page:
https://www.bosch-home.co.uk/product-list/KUR15A50GB#/Tabs=section-technicalspecs/Togglebox=manuals/

Personally I find the old school plastic coated spring, the stuff that folk use to hang net curtains, is really useful for clearing out the drainage hole.

Dghj, December 2023