Small holes in a T-shirt: why they always appear in the same place

The washing machine can play a role, but is not necessarily the cause.

If the holes consistently appear in the same spot, this indicates that the fabric has already been weakened at a certain point due to wear or repeated friction.

However, high spin 
speeds, aggressive wash cycles, or a damaged

drum can put extra stress on already weakened fibers. In discussions about this issue, some users report improvements from gentler wash cycles and lower spin speeds. (Houzz)

Are clothes moths the cause?

Small holes in clothing can, in principle, be caused by certain insects. However, if the damage consistently