best ways to manage frost in freezer

We can replace the current freezer with a new no-frost freezer
to solve this but assuming I'm not prepared to replace it yet,
what can we do?  Quite a hassle to remove all foods from
the freezer, switch off the freezer for 3 hrs to let all its frost
thaw (very often, the frost is so thick that the shelves of the
freezer got blocked & can't be opened.

What are the methods or strategies we can best manage
this?  Set the temperature to below medium (in which case
the lower few shelves will not be cold enough to freeze the
ice-creams) or we have to 'chisel' away (any such chisel)
on a daily basis so that the frost don't build up over 3-4
weeks that it blocks the shelves.

I live in a full tropical country where the room temperature
is constantly between 26-31 Celsius all year round with
high environmental humidity

https://www.bobvila.com/articles/frost-in-freezer/
Referencing the link above, I don't put hot/warm foods in
the freezer;  it's mostly ice cubes, ice cream & frozen fish
cake/fishballs: freezer is about 65-90% loaded & often
there's reusable ice pack in it.