So every single time my children spend more than one night at their fathers and his wife they come back with headlice! They've just got back from 3 weeks at his and they are riddled their hair was clear before they left I have spent every night they are with me checking their hair cause they keep getting them after visiting him, they were home 2 whole weeks before going to his for 3 and I'd treated them twice and gone through every night there was nothing for a whole week before they left, everytime I bring it up with him it's usually school his excuse but we've been in lockdown and they haven't seen anyone but me and him and his wife, I don't have them and neither does my youngest (different father) he's now saying I don't treat them correctly and it's my fault I've spent over £90 in lotions over the past 2 months and hours with but comb I don't know what to do anymore and find it so unfair he won't even acknowledge that they are getting them when with him