Mouldy terracotta pots

I'm sorry if this is in the wrong place but here it goes anyway.I've got some lovely terracotta pots that I've planted up with herbs to put on the windowsil in the house.They're really lovely and handy to have in the kitchen but the only problem is the pots keep getting mouldy on the outside and I mean mouldy .Really big fury ,woolly grey mould.It isn't what you want in the kitchen really so does anybody know why it is happening and how I can stop it.I have thought of wipeing them with a bit of diluted jeyes fluid but I think my wife would go a bit loopy with the smell and who would blame her.Any other better ideas would be greatly appreciated

If they're going mouldy, are they in the shade? If so, herbs generally need to be in full sun and perhaps the kitchen is too warm and humid and as terracotta pots are porous,this would encourage mould formation. I would suggest decorative ceramic pots for inside or put your pots outside on the outside windowsill.

Be wary of wiping with bleach because the pots are porous and it could leach inside to the soil. Clear varnish sounds better and will help to keep the moisture in.