Cleaning method

Intervention group (n = 20) Mean ± SD

Control group (n = 15) Mean ± SD

p value

Warm water only

26.1 ± 26.3

16.5 ± 29.9

0.079 ns

Soap and warm water

68.5 ± 12.3

53.1 ± 17.8

0.045*