is it the jets not squirting nice or are they just aimed too low?
jets may just need cleaning out. take em off the car and give a good rinse under the tap, pokey down the ends with a pin see if you can dislodge any crap buildup.
while you're there check pipes for kinks and splits, also look at the washer bottle. if its all full o crud they'll just get blocked again. clean it out inside as best you can. if all that fails try jumping the pump with 12v from the battery, if its better you might need to change the stalks or the pump